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+[toc]
+
+# DDE Desktop Environment User Manual
+
+## Overview
+DDE desktop environment is an elegant, secure, reliable and easy to use GUI comprised of the desktop, dock, launcher and control center. Acting as the key basis for our operating system, its main interface is shown as below.
+
+
+
+### Getting Started
+
+When you enter DDE for the very first time, a welcome program will automatically start. You can watch the introduction video, select your desktop style and icon theme, and learn more about the system functions.
+
+
+
+Once login, you are experiencing UnionTech OS Desktop Environment, which is comprised of Desktop, Dock, Launcher, and Control Center.
+
+Read below and learn how to work in the UnionTech OS Desktop Environment.
+
+## Desktop
+
+Desktop is the main screen you see after logging in. On the desktop, you can create a new file/folder, sort files, open in terminal, set wallpaper and screensaver and etc. You can also add shortcuts for applications on desktop by using [Send to desktop](#Set App Shortcut).
+
+
+
+### Create New Folder/Document
+Just as in File Manager, you can create a new folder/document on the desktop, or do some operations for the files on it.
+
+- Right-click the desktop, select **New folder** and enter the name for it.
+- Right-click the desktop, select **New document**, select the type and enter its name.
+
+Right-click a file or folder on the desktop, and use the features of File Manager as below:
+
+| Function | Description |
+| ---------------- | ------------------------------------------------------------ |
+| Open with | Select an app to open it. |
+| Cut | Move it to another location. |
+| Copy | Copy it to another location. |
+| Rename | Change its name. |
+| Delete | Delete and move it to the trash. |
+| Create link | Create a shortcut of the file or folder. |
+| Tag information | Add a tag. |
+| Compress/Extract | Compress the file or folder, or extract the compressed file. |
+| Properties | View the basic info, share it or change the permission. |
+
+### Sort Files
+
+Sort the files on your desktop to make it organized and fit your needs.
+
+1. Right-click the desktop.
+2. Click **Sort by**, you can:
+
+ - Click **Name** to display files in the name sequence.
+ - Click **Size** to display files in the size sequence.
+ - Click **Type** to display files in type.
+ - Click **Time modified** to display files in the order of last modified date.
+
+
+> Tips: *Check **Auto arrange**, icons on the desktop will be listed in order automatically, and if an icon is removed, another one will fill in the blank.*
+
+
+
+
+### Adjust Icon Size
+
+1. Right-click the desktop.
+2. Click **Icon size**, and choose a proper size.
+
+> Tips: *Press **Ctrl** + / /scrolling mouse wheel to adjust icon size on the desktop and in Launcher.*
+
+### Set Display
+You can set display scaling, screen resolution, brightness and so on from the desktop.
+
+1. Right-click the desktop.
+2. Click **Display Settings** to open the settings in Control Center.
+
+> Notes: *For specific operations, please refer to [Display](#Display).*
+
+### Change Wallpaper
+Select some elegant and fashionable wallpapers to beautify your desktop and make it distinctive.
+
+1. Right-click the desktop.
+2. Click **Wallpaper and Screensaver** to preview all the wallpapers.
+3. Click your favorite one and it will apply in your desktop and screen lock.
+4. You can also choose **Only desktop** or **Only lock screen**.
+
+
+
+
+
+> Tips: *You can also set your favorite picture as wallpaper in an image viewer.*
+
+### Clipboard
+
+All the texts, pictures and documents cut and copied by the current user after login are displayed in the clipboard, which can be copied quickly by double-clicking the clipboard. The clipboard is cleared automatically after logout and shutdown.
+
+1. Use the shortcuts **Ctrl**+**Alt**+ **V** to wake up the clipboard.
+
+2. Double-click in the clipboard to copy the current content quickly and the corresponding block will be moved to the top of the clipboard.
+
+3. Select the target destination to paste it.
+
+4. Clickto delete the current content and click **Clear All** to clear the clipboard.
+
+ 
+
+## Dock
+
+Dock is at the bottom of the desktop by default to help you quickly open frequently-used applications, which includes Launcher, applications, system tray, and plugins. In the dock, you can open launcher, show the desktop, enter the workspaces, open and exit apps, set input methods, adjust the volume, connect to the network, view the calendar and enter the shutdown interface, and so on.
+
+### Icons on Dock
+In the Dock, there are icons of Launcher, applications, system tray, and plugins.
+
+
+
+
+
+| Icon | Description |
+| ---- | ---- |
+|  | Launcher - click to view all the installed applications. |
+|  | Click to show the desktop. |
+|  | File Manager - click to view files and folders on the disk. |
+|  | Calendar - view dates and create new schedules. |
+|  | Control Center - click to check or change system settings. |
+|  | Notification Center - show all notifications from the system and applications. |
+|  | Onboard virtual keyboard. |
+|  | Click to enter the shutdown interface. |
+|  | Trash. |
+
+> Tips: *In Efficient Mode, you can click the right side of Dock to show the desktop. Move the cursor to the running app in the Dock and you will see its preview window.*
+
+### Switch Display Mode
+There are two display modes of Dock: fashion mode and efficient mode, icon sizes are different in them.
+
+
+
+
+
+You can switch the display modes by the following operations:
+
+1. Right-click the Dock and select **Mode**.
+2. Select the display mode.
+
+### Change Dock Location
+You can place Dock on any direction of your desktop.
+
+1. Right-click the Dock and select **Location**.
+2. Select a location.
+
+### Change Dock Height
+Drag the top edge to increase or decrease the height.
+
+
+### Show/Hide Plugins
+
+1. Right-click the Dock and select **Plugins**.
+2. On the submenu, you can check or uncheck **Trash, Power, Show Desktop, Onboard**, and **Datetime** to show or hide the corresponding icon in the Dock.
+
+### View Notifications
+When there are system or application notifications, they will be shown in the middle of the screen. If there are buttons in the message, click buttons to do the actions; if there are not, click the message to close it.
+
+
+
+
+
+Click  in Dock to view all the notifications.
+
+### View Date and Time
+
+- Hover the cursor over the Time icon in Dock to view the current time, date and day of the week.
+- Click the Time icon to open Calendar.
+
+### Enter Shutdown Interface
+
+There are two ways to enter the shutdown interface:
+
+- Click  in Dock.
+- Click  at the bottom right corner of Launcher mini mode.
+
+| Function | Description |
+| ------------------------------------------------------------ | ------------------------------------------------------------ |
+| Shut down  | Shut down the computer. |
+| Reboot  | Restart the computer. |
+| Lock  | Lock the computer with the password. Or press **Super** + **L** to lock it. |
+| Switch user  | Log in with another user account. |
+| Log out  | End all the processes and initialize the system. |
+| Start system monitor | View the running processes and end the one you want. |
+
+> Notes:  *will be shown if there are multiple accounts in the system.*
+
+### Trash
+You can find all deleted files in the trash, which can be restored or emptied.
+
+#### Restore Files
+
+You can restore deleted files in Trash or press **Ctrl** + **Z** to restore the lately deleted files.
+
+1. Select the file in the trash.
+2. Right-click the file and select **Restore**.
+3. The file will be in its original path.
+
+> Attention: *If the original folder of the file has been deleted, the deleted file will be restored to a new folder automatically created.*
+
+#### Empty Trash
+In the trash, click **Empty** to permanently delete all the files in the trash.
+
+## Launcher
+Launcher  helps you manage all the installed applications, where you can quickly find an application by category navigation or by a search.
+
+> Tips: *You can view newly installed applications in Launcher. The newly-installed ones are followed with a blue dot.*
+
+
+### Switch Launcher Modes
+
+There are two display modes of Launcher: fullscreen mode and mini mode. Click the icon at the upper right corner to switch modes.
+
+Both modes support searching applications and sending them to the desktop or Dock.
+
+The mini mode also supports opening File Manager, Control Center and shutdown interface directly.
+
+
+
+
+### Sort Applications
+
+In fullscreen mode, all applications in Launcher are listed by the installation time by default. You can sort the application icons as the ways below:
+
+- Hover the cursor over an application icon, hold down the left key of mouse, drag and drop the application icon to arrange it freely.
+- Click the category icon  on the upper left in Launcher to arrange the icons by category.
+
+
+
+In mini mode, applications are displayed according to using frequency by default.
+
+### Find Applications
+
+In Launcher, you can scroll up and down to find an application, or locate it with the category navigation.
+
+If you already know the application name, just search for it.
+
+### Set App Shortcut
+The shortcut offers a method to run applications easily and quickly.
+
+#### Create App Shortcut
+Send the application icon to the desktop or Dock to facilitate the follow-up operations.
+
+In Launcher, right-click an app icon and you can:
+
+* Select **Send to desktop** to create a shortcut on the desktop.
+* Select **Send to dock** to fix the application icon in Dock.
+
+
+
+> Notes: *You can drag the application icon from Launcher to Dock. But you cannot drag and drop the application while it is running. Then you can right-click the application icon in Dock and select **Dock** to fix it in order to open it quickly for the next time.*
+
+#### Delete Shortcut
+Delete a shortcut from the desktop directly, or remove it from Dock or Launcher.
+
+**Remove the shortcut from Dock:**
+
+- Hold down the left key of mouse, drag and drop the icon away from Dock.
+- You cannot drag and drop the application icon while it is running. Then you can right-click the application icon in Dock and select **Undock** to remove it from Dock.
+
+**Remove the shortcut from Launcher:**
+
+In Launcher, right-click the icon and you can:
+- Select **Remove from desktop** to delete the shortcut from the desktop.
+- Select **Remove from dock** to remove the application icon from Dock.
+
+> Notes: *The above operations only delete the shortcut rather than uninstall the applications.*
+
+### Run Applications
+For the applications whose shortcuts have been created on the desktop or Dock, you can open them in the following ways:
+
+- Double-click the desktop icon or right-click it and select **Open**.
+- Click the application icon in Dock or right-click it and select **Open**.
+
+To open the application only shown in Launcher, click the icon or right-click it and select **Open**.
+
+> Tips: *For the frequently-used applications, right-click the app icon and select **Add to startup** to run it when the computer boots.*
+
+
+## Control Center
+You can manage the system settings in Control Center, including account management, network settings, date and time, personalization, display settings, etc. After entering the desktop environment, click  to open Control Center.
+
+### Homepage Introduction
+The homepage of Control Center provides several setting modules and click one to enter the detailed settings.
+
+
+
+Once you open a setting module in Control Center, the navigation appears on the left. Click the left navigation to quickly switch to other settings.
+
+
+
+#### Title Bar
+
+The title bar contains the back button, search box, main menu and the window buttons.
+
+- Back button: Click  to go back to the homepage.
+- Search box: Input a keyword and search the related settings.
+- Main menu: Click  to enter the main menu where you can set the window theme, view the manual and exit.
+
+### Accounts
+You have already created an account when installing the system. Here you can modify account settings or create a new one.
+
+
+
+#### Create New Account
+
+1. On the homepage of Control Center, click .
+2. Click .
+3. Input a username and a password twice.
+4. Click **Create**.
+5. Input the password of the current user account in the authentication dialog box, and the new account will be added to the account list.
+
+
+#### Change Account Avatar
+
+1. On the homepage of Control Center, click .
+2. Click an existing account in the list.
+3. Click the user avatar.
+4. Select a avatar or upload a local avatar.
+
+#### Set Full Name
+The account full name is shown in account list and system login interface and you can set it as needed.
+
+1. On the homepage of Control Center, click .
+2. Click an existing account in the list.
+3. Click  after **Full Name**, and input a name.
+
+#### Change Password
+
+1. On the homepage of Control Center, click .
+
+2. Click the current account.
+
+3. Click **Change Password**.
+
+4. Input a new password twice and confirm.
+
+#### Delete Account
+
+1. On the homepage of Control Center, click .
+2. Click an account that's not logged in.
+3. Click **Delete Account**.
+4. Click **Delete** in the pop-up window.
+
+> Attention: *The logged in account cannot be deleted.*
+
+#### Privilege
+
+The first account has administrator privilege when you install the system. All other accounts you add after that are common users. One account can be grouped in many user groups.
+
+##### Group setting
+
+When you add or modify accounts, you can:
+
+- Select a group existing in the system.
+- Select the group with the same name as the current user.
+- Select the group with the same name as another user when the account was previously added.
+
+### Display
+Set screen resolution, brightness, direction and display scaling properly to have the best visual effect.
+
+
+
+
+#### Single Screen Settings
+
+##### Change Resolution
+
+1. On the homepage of Control Center, click .
+2. Click **Resolution**.
+3. Select a proper resolution in the list.
+4. Click **Save**.
+
+##### Adjust Brightness
+
+1. On the homepage of Control Center, click .
+2. Click **Brightness**.
+ - Drag the slider to set screen brightness.
+ - Switch on **Night Shift**, the screen hue will be auto-adjusted according to your location.
+ - Switch on **Auto Brightness**, the monitor will change the brightness automatically according to ambient light (shown only if PC has a light sensor).
+
+##### Change Refresh Rate
+1. On the homepage of Control Center, click .
+2. Click **Refresh Rate**.
+3. Select a proper one, and click **Save**.
+
+##### Change Display Direction
+
+1. On the homepage of Control Center, click .
+2. Click .
+3. Every time you click, the screen will rotate 90 degrees counterclockwise.
+4. To restore to the original direction, click the right button to exit; to use the current direction, press **Ctrl**+ **S** to save it.
+
+#### Multiple Screen Settings
+
+Expand your desktop by multiple screens! Use VGA/HDMI/DP cable to connect your computer to other display devices.
+
+1. On the homepage of Control Center, click .
+2. Click **Multiple Displays**.
+3. Select a display mode:
+ - **Duplicate**: display the same image on other screens.
+ - **Extend**: expand the desktop across the screens.
+ - **Customize**: customize the display settings for multiple screens.
+
+In multiple displays, press **Super** + **P** to show its OSD.
+
+Operations are as follows:
+
+1. Hold **Super** and press **P** or click to select the options.
+2. Release the keys, the selected mode will take into effect.
+
+>Notes: *When the multiple displays are in the extend mode, only the main screen supports desktop icon display, right-click menu operation and other functions, while the sub-screens do not.*
+
+##### Custom Settings
+
+1. On the homepage of Control Center, click .
+2. Click **Multiple Displays** > **Customize**.
+3. Click **Recognize**.
+4. Choose **Merge** or **Split** the screens, specify the main screen, set the resolution and refresh rate, and rotate screen if you want.
+5. Click **Save**.
+
+> Notes: *"Merge" means duplicate mode, "Split" means extend mode.*
+
+### Default Application Settings
+If you have installed several applications with similar functions, such as text editor, choose one of them to be the default application to open that type of file.
+
+
+
+#### Set Default Application
+
+1. Right-click the file, choose **Open with** > **Set default program**.
+2. Select one application, **Set as default** is checked by default, and click **Confirm**.
+3. The application will automatically be added to the default application list in Control Center.
+
+#### Change Default Application
+
+1. On the homepage of Control Center, click .
+2. Select a file type.
+3. Select another one in the list as the default application.
+
+#### Add Default Application
+
+1. On the homepage of Control Center, click .
+2. Select a file type.
+3. Click  below to add a desktop file (usually at /usr/share/applications) or a specified binary file as the default application.
+4. The application will be added to the list and set as default application automatically.
+
+#### Delete Default Application
+
+In the default application list, you can only delete the applications you added. To remove other applications from the list, the only way is to uninstall them. Once uninstalled, they will automatically be deleted from the list.
+
+To delete the default applications you have added, do as below:
+
+1. On the homepage of Control Center, click .
+2. Select a file type.
+3. Click  after the application name to delete it.
+
+
+### Personalization Settings
+You can set theme, accent color, font, change the appearance of the desktop and windows to your favorite style.
+
+
+
+#### Set Window Theme
+1. On the homepage of Control Center, click .
+2. Click **General**.
+3. Select one window theme, which will be used as system theme.
+
+> Notes: *"Auto" means changing window theme automatically according to the sunset and sunrise time. After sunrise, it is light theme; after sunset, it is dark theme.*
+
+#### Change Accent Color
+Accent color refers to the color used when you select one option or file in the system.
+
+1. On the homepage of Control Center, click .
+2. Click **General**.
+3. Pick a color under **Accent Color** and view its effects.
+
+#### Set Icon Theme
+
+1. On the homepage of Control Center, click .
+2. Click **Icon Theme** and select an icon style.
+
+
+#### Set Cursor Theme
+
+1. On the homepage of Control Center, click .
+2. Click **Cursor Theme** and select a set of cursors.
+
+#### Change Font
+
+1. On the homepage of Control Center, click .
+2. Click **Font**.
+3. Set the font and font size for the system.
+
+
+### Network Settings
+After login, you need to connect to a network first and then surf the Internet!
+
+> Tips: *Check your network status by hovering over or clicking the network icon in Dock.*
+
+
+
+#### Wired Network
+
+Wired network is secure and stable, which makes it the most common way to connect to the Internet. After your router is set, connect both ends of the network cable to the computer and router to connect to a wired network.
+
+1. Plug the cable into the network slot of a computer.
+2. Plug another end of the cable into the router or network port.
+3. On the homepage of Control Center, click .
+4. Click **Wired Network** to enter the setting page of wired network.
+5. Switch on **Wired Network Adapter** to enable wired network.
+6. If it is successfully connected to the network, there will be a prompt "Wired Connection connected".
+
+You can also edit and add a new wired network in the setting page.
+
+#### Mobile Network
+If you are at a place without network, mobile network adapter is a useful tool to help you connect to the Internet as long as the place is covered by telephone signals.
+
+1. Plug the mobile network adapter into your computer USB port.
+2. Your computer will auto connect to the network.
+3. On the homepage of Control Center, click .
+4. Click **Mobile Network** to view the detailed network info.
+
+#### DSL/PPPoE Connections
+
+DSL is a dial-up connection using a standard phone line and analog modem to access the Internet. Configure the modem, plug the telephone line into the network interface of the computer, create a broadband dial-up connection, and enter the user name and password provided by the operator to dial up the Internet.
+
+##### Create a PPPoE Connection
+
+1. On the homepage of Control Center, click .
+2. Click **DSL**.
+3. Click .
+4. Enter the name, your account and password the operator provides.
+5. Click **Save**. The connection will automatically start.
+
+
+#### VPN
+
+VPN is a virtual private network. Its main function is to establish a private network on the public network for encrypted communication. Whether you are on a business trip or working at home, you can use VPN to access intranet resources as long as you can access the Internet. You can also use VPN to speed up access to websites in other countries.
+
+1. On the homepage of Control Center, click .
+2. Click **VPN**, and click  or .
+3. Select the VPN protocol type, and enter the name, gateway, account, password and other information. (Importing VPN will automatically fill in information)
+4. Click **Save**, the system will try to connect VPN network automatically.
+5. You can export the VPN settings to backup or share with other users.
+
+> Notes: *If you don't want to use the VPN as the default routing, but only want it to take effect on specific network resources, switch on **Only applied in corresponding resources**.*
+
+#### System Proxy
+
+1. On the homepage of Control Center, click .
+2. Click **System Proxy**.
+ - Click **None** and **Save** to disable the proxy.
+ - Click **Manual** and input the address and port of proxy servers.
+ - Click **Auto** and input a URL to configure the proxy info.
+
+#### Application Proxy
+
+1. On the homepage of Control Center, click .
+2. Click **Application Proxy**.
+3. Select a proxy type, and fill in the IP address, port, etc.
+4. Click **Save** to save the proxy settings.
+
+> Notes: *After being configured, run Launcher, right-click any application's icon and check **Use a proxy**, and then the application will be opened by proxy.*
+
+#### Network Info
+
+You can view MAC, IP address, gateway and other network info in network details.
+
+1. On the homepage of Control Center, click .
+2. Click **Network Details**.
+3. View the network info of the current network.
+
+### Sound Settings
+
+Set your speaker and microphone properly to make you hear more comfortable and make clearer recordings.
+
+
+
+#### Output
+
+1. On the homepage of Control Center, click .
+
+2. Click **Output** to:
+
+ - Select output device type from the dropdown list after **Output Device**.
+
+ - Drag the slider to adjust output volume and left/right balance.
+ - Switch on **Volume Boost**, the volume could be adjustable from 0~150% (the former range is 0~100%).
+
+
+
+#### Input
+
+1. On the homepage of Control Center, click .
+2. Click **Input** to:
+ - Select input device type from the dropdown list after **Input Device**.
+ - Adjust input volume by dragging the slider.
+ - You can enable **Automatic Noise Suppression** by clicking the button after "Automatic Noise Suppression".
+
+> Tips: *Usually, you need to turn up the input volume to make sure that you can hear the sound of the sound source, but the volume should not be too high, because it will cause distortion of the sound. Here is how to set input volume: Speak to your microphone at a normal volume and view "Input Level". If the indicator changes obviously according to the volume, then the input volume is at a proper level.*
+
+
+
+#### System Sound Effects
+
+1. On the homepage of Control Center, click .
+2. Click **Sound Effects**, check the options you want to switch on the sound when the corresponding event occurs.
+
+> Tips: *Click to listen to the sound effect.*
+
+### Date and Time
+Set your timezone properly to have correct date and time. You can also change them manually.
+
+
+
+#### Change Timezone
+You have selected the timezone during system installation and do as follows to change it.
+
+1. On the homepage of Control Center, click .
+2. Click **Timezone List**.
+3. Click **Change System Timezone** and select a timezone by searching or clicking on the map.
+4. Click **Confirm**.
+
+#### Add Timezone
+Add another timezone to see the date and time there.
+
+1. On the homepage of Control Center, click .
+2. Click **Timezone List**.
+3. Click , select a timezone by searching or clicking on the map.
+4. Click **Add**.
+
+#### Delete Timezone
+
+1. On the homepage of Control Center, click .
+2. Click **Timezone List**.
+3. Click **Edit** after "Timezone List".
+4. Click  to remove the timezone.
+
+#### Change Date and Time
+Note that the auto-sync function will be disabled after changing date and time manually.
+
+1. On the homepage of Control Center, click .
+2. Click **Time Settings**.
+ - Switch on/off **Auto Sync**.
+ - Enter the correct date and time.
+3. Click **Confirm**.
+
+#### Set Time Format
+
+Setting the format of time and date is supported.
+
+1. On the homepage of Control Center, click .
+2. Click **Time Format** to set the first day of week, long date, short date, long time, and short time.
+
+
+
+### Power Management
+
+Power management helps you to improve system safety.
+
+
+
+
+
+#### Time to Suspend
+
+1. On the homepage of Control Center, click .
+2. Click **Plugged In**.
+3. Set the time to suspend.
+
+#### Time to Lock Screen
+1. On the homepage of Control Center, click .
+2. Click **Plugged In**.
+3. Set the time to lock screen.
+
+#### Power button settings
+
+1. On the homepage of Control Center, click .
+2. Click **Plugged In**.
+3. You can select **Shut down, Suspend, Hibernate, Turn off the monitor, Do nothing** from the drop-down list after **When pressing the power button**.
+
+Any operation done here will take effect immediately. At the same time, the system will notify the user that the power button setting is changed.
+
+
+
+### Mouse
+
+Mouse is common computer input device. Using the mouse, you can make the operation easier and faster.
+
+
+
+#### General Settings
+
+1. On the homepage of Control Center, click .
+2. Click **General**.
+3. Switch on **Left Hand**, and adjust **Scrolling Speed**, **Double-click Speed**.
+
+> Notes: *If "Left Hand" is enabled, left-click and right-click of the mouse exchange.*
+
+#### Mouse
+After inserting or connecting the mouse, make relevant settings in the Control Center to make it more in line with your usage habits.
+
+1. On the homepage of Control Center, click .
+2. Click **Mouse**.
+3. Adjust **Pointer Speed**, which helps you to control the speed at which the pointer moves as the mouse moves.
+4. Switch on **Natural Scrolling**/**Mouse Acceleration** if you want.
+
+> Notes:
+> - *Turn on the mouse acceleration to improve the accuracy of the pointer. The moving distance of the mouse pointer on the screen will increase according to the acceleration of the moving speed. It can be turned on or off according to the usage.*
+> - *If Natural Scrolling is enabled, when you scroll down, the page will scroll down, when you scroll up, the page will scroll up as well.*
+
+### Keyboard and Language
+Set keyboard properties and select your keyboard layout to keep your typing habit. You can also adjust the keyboard layout according to the country and language, change system language, and customize shortcuts here.
+
+
+
+#### Keyboard Properties
+
+1. On the homepage of Control Center, click .
+2. Click **General**.
+3. Adjust **Repeat Delay**/**Repeat Rate**.
+4. Click "Test here" and hold down a key to test the repeat rate.
+5. Switch on **Numeric Keypad** and **Caps Lock Prompt** if you want.
+
+#### Keyboard Layout
+Set the keyboard layout to customize the keyboard for the current language. When you press a key on the keyboard, the keyboard layout controls which characters are displayed on the screen. After changing the keyboard layout, the characters on the screen may not match the characters on the keyboard keys.
+
+You have set a keyboard layout during system installation, but you can add more for other purposes.
+
+
+
+##### Add Keyboard Layout
+
+1. On the homepage of Control Center, click .
+2. Click **Keyboard Layout**.
+3. Click . Click a keyboard layout to add it.
+
+##### Delete Keyboard Layout
+
+1. On the homepage of Control Center, click .
+2. Click **Keyboard Layout**.
+3. Click **Edit**.
+4. Click  to delete keyboard layout.
+
+##### Switch Keyboard Layout
+
+1. On the homepage of Control Center, click .
+2. Click **Keyboard Layout**.
+3. Click the layout you want to switch to.
+4. After successful switching, the layout will be marked with a check.
+
+> Tips: *You can also select one or more shortcuts to switch the keyboard layouts in order. Select **Applies to** to make the keyboard layout after switching be applied to the whole system or current application.*
+
+#### System Language
+
+The system language is the language you selected when you installed the system by default, which can be changed at any time.
+
+##### Add System Language
+Add multiple languages into the list to change language conveniently.
+
+1. On the homepage of Control Center, click .
+2. Click **System Language**.
+3. Click  to enter the language list.
+4. Select the language you want, and it will be added into system language list automatically.
+
+##### Change System Language
+
+1. On the homepage of Control Center, click .
+2. Click **System Language**.
+3. Select the language you want to switch to, and the language package will be installed automatically.
+4. After being successfully installed, log out and log in again to view the changes.
+
+> Attention: *The keyboard layout may also be changed in the process of switching the system language. Please make sure that you select a correct keyboard layout to enter the login password.*
+
+#### Shortcuts
+The shortcut list includes all shortcuts in the system. View, modify and customize the shortcuts here as you want.
+
+
+
+##### View Shortcuts
+
+1. On the homepage of Control Center, click .
+2. Click **Shortcuts**.
+3. You can search or view the default shortcuts for system, window and workspace.
+
+
+##### Modify Shortcuts
+
+1. On the homepage of Control Center, click .
+2. Click **Shortcuts**.
+3. Click the shortcut you want to modify.
+4. Press new shortcut to change it.
+
+> Tips: *To disable a shortcut, please press  on the keyboard. To cancel modifying, press **Esc** or click Restore Defaults at the bottom.*
+
+##### Customize Shortcuts
+
+1. On the homepage of Control Center, click .
+2. Click **Shortcuts**.
+3. Click .
+4. Enter the name, command and shortcut.
+5. Click **Add**.
+6. After being successfully added, click **Edit**.
+7. Click  to delete the custom shortcut.
+
+> Tips: *To change the shortcut, click it and press a new shortcut to change it directly. To edit the name and command of the custom shortcut, click **Edit ** >  near the shortcut name to enter the shortcut settings.*
+
+### System Info
+
+You can view system version, authorization info, hardware info, and the agreements here.
+
+
+
+#### About This PC
+
+1. On the homepage of Control Center, click .
+2. Under **About This PC**, you can view system version, authorization and hardware information.
+3. If the system has not been activated, click **Activate** to activate the system.
+
+#### Edition License
+
+1. On the homepage of Control Center, click .
+2. View the system edition license under **Edition License**.
+
+#### End User License Agreement
+
+1. On the homepage of Control Center, click .
+2. View the End User License Agreement under **End User License Agreement**.
+
+## Keyboard Interaction
+
+You can use the keyboard to switch between various interface areas, select objects and perform operations.
+
+| Key | Function |
+| :----------------------------------------------------------- | :----------------------------------------------------------- |
+| **Tab** | Switch between different areas or dialog buttons. |
+|     | Used to select different objects in the same area. Press  to enter the lower menu and  to return to the upper menu. Pressand  to switch between up and down. |
+| **Enter** | Execute the selected operation. |
+| **Space** | Preview the selected object in File Manager; start and pause the playback in Music and Movie; expand the drop-down options in the drop-down list (The enter key is also available.). |
+| **Ctrl** + **M** | Open the right-click menu. |
+
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+[TOC]
+
+# DDE桌面环境用户手册
+
+## 概述
+
+DDE桌面环境是一款美观易用、安全可靠的图形化操作界面。桌面环境主要由桌面、任务栏、启动器、控制中心等组成，是您使用该操作系统的基础，主界面如下图所示。
+
+
+
+### 欢迎
+
+初次进入DDE桌面环境，会自动打开欢迎程序。您可以观看视频了解系统功能，选择桌面样式和图标主题，进一步了解该系统。
+
+
+
+## 桌面
+
+桌面是您登录后看到的主屏幕区域。在桌面上，您可以新建文件/文件夹、排列文件、打开终端、设置壁纸和屏保等，还可以通过启动器 [发送到桌面](#设置快捷方式) 向桌面添加应用的快捷方式。
+
+
+
+### 新建文件夹/文档
+
+在桌面新建文件夹或文档，也可以对文件进行常规操作，和在文件管理器中一样。
+
+- 在桌面上，单击鼠标右键，单击 **新建文件夹**，输入新建文件夹的名称。
+- 在桌面上，单击鼠标右键，单击 **新建文档**，选择新建文档的类型，输入新建文档的名称。
+
+在桌面文件或文件夹上，单击鼠标右键，您可以使用文件管理器的相关功能：
+
+| 功能 | 说明 |
+| ----------- | -------------------------------------------------------- |
+| 打开方式 | 选定系统默认打开方式，也可以选择其他关联应用程序来打开。 |
+| 剪切 | 移动文件或文件夹。 |
+| 复制 | 复制文件或文件夹。 |
+| 重命名 | 重命名文件或文件夹。 |
+| 删除 | 删除文件或文件夹。 |
+| 创建链接 | 创建一个快捷方式。 |
+| 标记信息 | 添加标记信息，以对文件或文件夹进行标签化管理。 |
+| 压缩/解压缩 | 压缩文件或文件夹，或对压缩文件进行解压。 |
+| 属性 | 查看文件或文件夹的基本信息，共享方式，及其权限。 |
+
+### 设置排列方式
+
+您可以对桌面上的图标按照需要进行排序。
+
+1. 在桌面上，单击鼠标右键。
+2. 单击 **排序方式**，您可以：
+ - 单击 **名称**，将按文件的名称顺序显示。
+ - 单击 **大小**，将按文件的大小顺序显示。
+ - 单击 **类型**，将按文件的类型顺序显示。
+ - 单击 **修改时间**，文件将按最近一次的修改日期顺序显示。
+
+> 窍门：*您也可以勾选 **自动排列**，桌面图标将从上往下，从左往右按照当前排序规则排列，有图标被删除时后面的图标会自动向前填充。*
+
+### 调整图标大小
+
+1. 在桌面上，单击鼠标右键。
+2. 单击 **图标大小**。
+3. 选择一个合适的图标大小。
+
+> 窍门：*您也可以用 **Ctrl** + //鼠标滚动来调整桌面和启动器中的图标大小。*
+
+### 设置显示器
+
+从这里快速进入控制中心设置显示器的缩放比例、分辨率和亮度等。
+
+1. 在桌面上，单击鼠标右键。
+2. 单击 **显示设置**，快速进入控制中心的显示设置界面。
+
+> 说明：*关于显示的设置，具体操作请参阅 [显示设置](#显示设置) 。*
+
+ ### 更改壁纸
+
+您可以选择一些精美、时尚的壁纸来美化桌面，让您的电脑显示与众不同。
+
+
+1. 在桌面上，单击鼠标右键。
+2. 单击 **壁纸与屏保**，在桌面底部预览所有壁纸。
+3. 选择某一壁纸后，壁纸就会在桌面和锁屏中生效。
+4. 您可以单击 **仅设置桌面** 和 **仅设置锁屏** 来控制壁纸的生效范围。
+
+
+
+
+
+> 窍门： *您还可以在图片查看器中设置您喜欢的图片为桌面壁纸。*
+
+### 剪贴板
+
+剪贴板展示当前用户登录系统后复制和剪切的所有文本、图片和文件。使用剪贴板可以快速复制其中的某项内容。注销或关机后，剪贴板会自动清空。
+
+1. 使用快捷键 **Ctrl** + **Alt** + **V** 唤出剪贴板。
+2. 双击剪贴板内的某一区块，会快速复制当前内容， 且当前区块会被移动到剪贴板顶部。
+3. 选择目标位置粘贴。
+4. 鼠标移入剪贴板的某一区块，单击上方的，删除当前内容；单击顶部的 **全部清除**，清空剪贴板。
+
+
+
+## 任务栏
+
+任务栏是指位于桌面底部的长条，主要由启动器、应用程序图标、托盘区、系统插件等组成。在任务栏，您可以打开启动器、显示桌面、进入工作区，对其上的应用程序进行打开、新建、关闭、强制退出等操作，还可以设置输入法，调节音量，连接网络，查看日历，进入关机界面等。
+
+### 认识任务栏图标
+
+任务栏图标包括启动器图标、应用程序图标、托盘区图标、系统插件图标等。
+
+
+
+| 图标 | 说明 | 图标 | 说明 |
+| ------------------------------------------------------------ | :------------------------------------------ | ------------------------------------------------------------ | ------------------------------------- |
+|  | 启动器 - 点击查看所有已安装的应用。 |  | 显示桌面。 |
+|  | 文件管理器 - 点击查看磁盘中的文件、文件夹。 |  | 日历 - 查看日期、新建日程。 |
+|  | 控制中心 - 点击进入系统设置。 |  | 通知中心 - 显示所有系统和应用的通知。 |
+|  | 屏幕键盘 - 点击使用虚拟键盘。 |  | 电源 - 点击进入关机界面。 |
+|  | 回收站。 | | |
+
+
+
+> 窍门：*在高效模式下，单击任务栏最右侧可显示桌面。将鼠标指针移到任务栏上已打开窗口的图标时，会显示相应的预览窗口。*
+
+### 切换显示模式
+
+任务栏提供两种显示模式：时尚模式和高效模式，显示不同的图标大小和应用窗口激活效果。
+
+
+
+
+
+
+
+
+您可以通过以下操作来切换显示模式：
+
+1. 右键单击任务栏。
+2. 在 **模式** 子菜单中选择一种显示模式。
+
+### 设置任务栏位置
+
+您可以将任务栏放置在桌面的任意方向。
+
+1. 右键单击任务栏。
+2. 在 **位置** 子菜单中选择一个方向。
+
+### 调整任务栏高度
+
+鼠标拖动任务栏边缘，改变任务栏高度。
+
+### 显示/隐藏插件
+
+1. 右键单击任务栏。
+2. 在 **插件** 子菜单中勾选或取消勾选 **回收站、电源、显示桌面、屏幕键盘、通知中心、时间**，可以设置这些插件在任务栏上的显示和隐藏效果。
+
+### 查看通知
+
+当有系统或应用通知时，会在桌面上方弹出通知消息。若有按钮，单击按钮执行对应操作；若无按钮，单击关闭此消息。
+
+
+
+
+
+您还可以单击任务栏上的 ， 打开通知中心，查看所有通知。
+
+### 查看日期时间
+
+- 鼠标指针悬停在任务栏的时间上，查看当前日期、星期和时间。
+- 单击时间，打开日历。
+
+### 进入关机界面
+
+您可以单击任务栏上的  进入关机界面，也可以在启动器的小窗口模式中单击 。
+
+| 功能 | 说明 |
+| ------------------------------------------------------------ | ------------------------------------------------------- |
+| 关机 | 关闭电脑。 |
+| 重启 | 关机后再次重新运行您的电脑。 |
+| 锁定 | 锁定电脑，或按下键盘上的 **Super** + **L** 组合键锁定。 |
+| 切换用户 | 选择另一个用户帐户登录。 |
+| 注销 | 清除当前登录用户的信息。 |
+| 系统监视器 | 快速启动系统监视器。 |
+
+
+
+> 说明：*当系统存在多个帐户时才显示 。*
+
+
+### 回收站
+
+电脑中临时被删除的所有文件您都可以在回收站中找到，回收站中的文件可以被恢复或清空。
+
+#### 还原文件
+
+对于已删除的文件，您可以进入回收站进行还原，或使用 **Ctrl** + **Z** 还原刚删除的文件。
+
+1. 在回收站中，选择要恢复的文件。
+2. 单击鼠标右键，选择 **还原**。
+3. 还原文件到原来的存储路径下。
+
+> 注意：*如果原来所在的文件夹已经删除，还原文件时会自动新建文件夹*。
+
+#### 清空回收站
+
+在回收站中，单击 **清空**，将彻底删除回收站的所有内容。
+
+## 启动器
+
+启动器  帮助您管理系统中已安装的所有应用，在启动器中使用分类导航或搜索功能可以快速找到您需要的应用程序。
+
+> 窍门：*您可以进入启动器查看新安装的应用。新安装应用的旁边会出现一个小蓝点提示*。
+
+### 切换模式
+
+启动器有全屏和小窗口两种模式。单击启动器界面右上角的图标来切换模式。
+
+两种模式均支持搜索应用、设置快捷方式等操作。
+
+小窗口模式还支持快速打开文件管理器，控制中心和进入关机界面等功能。
+
+
+
+
+### 排列应用
+
+在全屏模式下，系统默认按照安装时间排列所有应用。
+
+- 将鼠标悬停在应用图标上，按住鼠标左键不放，将应用图标拖拽到指定的位置自由排列。
+- 单击启动器界面左上角分类图标进行排列。
+
+
+
+
+
+在小窗口模式下，默认按照使用频率排列应用。
+
+### 查找应用
+
+在启动器中，您可以滚动鼠标滚轮或切换分类导航查找应用。
+
+如果知道应用名称，直接在搜索框中输入关键字，快速定位到需要的应用。
+
+### 设置快捷方式
+
+快捷方式提供了一种简单快捷地启动应用的方法。
+
+#### 创建快捷方式
+
+将应用发送到桌面或任务栏上，方便您的后续操作。
+
+在启动器中，右键单击应用图标，您可以：
+
+- 单击 **发送到桌面**，在桌面创建快捷方式。
+
+- 单击 **发送到任务栏**，将应用固定到任务栏。
+
+
+
+> 说明：*您还可以从启动器拖拽应用图标到任务栏上放置。但是当应用处于运行状态时您将无法拖拽固定，此时您可以右键单击任务栏上的应用图标，选择 **驻留** 将应用固定到任务栏，以便下次使用时从任务栏上快速打开。*
+
+#### 删除快捷方式
+
+您既可以在桌面直接删除应用的快捷方式，也可以在任务栏和启动器中删除。
+
+**从任务栏上删除**
+
+- 在任务栏上，按住鼠标左键不放，将应用图标拖拽到任务栏以外的区域移除快捷方式。
+- 当应用处于运行状态时您将无法拖拽移除，此时可以右键单击任务栏上的应用图标，选择 **移除驻留** 将应用从任务栏上移除。
+
+**从启动器中删除**
+
+在启动器中，右键单击应用图标，您可以：
+
+- 单击 **从桌面上移除**，删除桌面快捷方式。
+- 单击 **从任务栏上移除**，将固定到任务栏上的应用移除。
+
+> 说明：*以上操作，只会删除应用的快捷方式，而不会卸载应用。*
+
+### 运行应用
+
+对于已经创建了桌面快捷方式或固定到任务栏上的应用，您可以通过以下途径来打开应用。
+
+- 双击桌面图标，或右键单击桌面图标选择 **打开**。
+- 直接单击任务栏上的应用图标，或右键单击任务栏上的应用图标选择 **打开**。
+
+在启动器中，直接单击应用图标打开，或右键单击应用图标选择 **打开**。
+
+> 窍门：*对于经常使用的应用，您可以在启动器中，右键单击应用图标选择 **开机自动启动**。*
+
+
+## 控制中心
+
+DDE桌面操作系统通过控制中心来管理系统的基本设置，包括帐户管理、网络设置、日期和时间、个性化设置、显示设置、系统信息查看等。当您进入桌面环境后，单击任务栏上的  即可打开控制中心窗口。
+
+### 首页介绍
+
+控制中心首页主要展示各个设置模块，方便日常查看和快速设置。
+
+
+
+
+
+打开控制中心的某一设置模块后，可以通过左侧导航栏快速切换到另一设置模块。
+
+
+
+
+
+#### 标题栏
+
+标题栏包含返回按钮，搜索框，主菜单及窗口按钮。
+
+- 返回按钮：若要返回首页，单击 。
+- 搜索框：输入关键字后，回车，搜索相应设置。
+- 主菜单：单击 进入主菜单。在主菜单中，您可以设置窗口主题，查看版本，或退出控制中心。
+
+### 帐户设置
+
+在安装系统时您已经创建了一个帐户。在这里，您可以修改帐户设置或创建一个新帐户。
+
+
+
+#### 创建新帐户
+
+1. 在控制中心首页，单击 。
+2. 单击。
+3. 输入用户名、密码和重复密码。
+4. 单击 **创建**。
+5. 在授权对话框输入当前帐户的密码，新帐户就会添加到帐户列表中。
+
+
+
+#### 更改头像
+
+1. 在控制中心首页，单击 。
+2. 单击列表中的帐户。
+3. 单击帐户头像，选择一个头像或添加本地头像，头像就替换完成了。
+
+#### 设置全名
+
+帐户全名会显示在帐户列表和系统登录界面，可根据需要设置。
+
+1. 在控制中心首页，单击 。
+2. 单击列表中的帐户。
+3. 单击 **设置全名** 后的 ，输入帐户全名。
+
+
+#### 修改密码
+
+1. 在控制中心首页，单击 。
+2. 单击当前帐户。
+3. 单击 **修改密码**，进入修改密码页面。
+4. 输入当前密码、新密码和重复密码。
+
+
+#### 删除帐户
+
+1. 在控制中心首页，单击 。
+2. 单击其他未登录的帐户。
+3. 单击 **删除帐户** 。
+4. 在弹出的确认界面中单击 **删除**。
+
+> 注意: *已登录的帐户无法被删除。*
+
+#### 权限设置
+
+除安装时的第一个帐户是管理员权限外，后面所添加的所有帐户都是普通用户。一个帐户可以在多个用户组内。
+
+##### 设置组
+
+添加或修改帐户时，可以：
+
+- 选择系统内已有的组。
+- 选择当前用户同名的组。
+- 选择之前添加帐户时和其他用户同名的组。
+
+### 显示设置
+
+设置显示器的分辨率、亮度、屏幕方向等，让您的电脑显示到达最佳状态。
+
+
+
+#### 单屏设置
+
+##### 更改分辨率
+
+1. 在控制中心首页，单击 。
+2. 单击 **分辨率**，进入分辨率设置界面。
+3. 在列表中选择合适的分辨率参数。
+4. 单击 **保存**。
+
+##### 调节亮度
+
+1. 在控制中心首页，单击 。
+2. 单击 **亮度**，进入亮度设置界面。
+
+ - 拖动亮度条滑块，调节屏幕亮度。
+ - 打开 **自动调节色温** 开关，开启进入护眼模式，自动调节色温。
+ - 打开 **手动调节** 亮度开关，可以调节屏幕亮度 。
+
+##### 设置屏幕刷新率
+
+1. 在控制中心首页，单击 。
+2. 单击 **刷新率**。
+3. 选择一个合适的刷新率，单击 **保存**。
+
+##### 改变屏幕方向
+
+1. 在控制中心首页，单击 。
+2. 单击  。
+3. 每单击一下鼠标左键，屏幕逆时针旋转90°。
+4. 要还原为之前的屏幕方向，单击鼠标右键退出；要使用当前屏幕方向，请按下组合键 **Ctrl** + **S** 保存。
+
+#### 多屏设置
+
+多屏显示，让您的视野无限延伸！使用VGA、HDMI、EDP等线缆将您的电脑和另一台显示器、投影仪等连接起来，同时在多个屏幕显示您电脑上的内容。
+
+1. 在控制中心首页，单击 。
+2. 单击 **多屏显示模式**。
+3. 选择一种显示模式。
+ - **复制 **将主屏的显示内容复制到其他屏幕。
+ - **扩展** 将主屏的显示内容扩展到其他屏幕，扩大桌面区域。
+ - **自定义** 设置显示模式，主屏、分辨率、刷新率和屏幕旋转方向。
+
+在多屏环境下，按下 **Super** + **P **调出多屏显示模式的OSD。
+
+详细操作方法如下。
+
+1. 按住 **Super** 不放，再按下 **P** 或鼠标单击来进行模式选择。
+2. 松开按键，确认选择，模式生效。
+
+> 说明：*当多屏显示模式为扩展模式时，仅主屏支持桌面图标显示、操作右键菜单等功能，而副屏不支持。*
+
+
+##### 自定义设置
+
+1. 在控制中心首页，单击 。
+2. 单击 **多屏显示模式** > **自定义**。
+3. 单击 “识别”，查看屏幕名称。
+4. 选择“合并”或“拆分”，然后对多个屏幕进行设置，如主屏、分辨率、刷新率，旋转屏幕等。
+5. 单击 **保存**。
+
+> 说明：*合并即复制模式，拆分即扩展模式。*
+
+
+
+### 默认程序设置
+
+当安装有多个功能相似的应用程序时，可以选择其中的一个应用作为对应文件类型的默认启动程序。
+
+
+
+#### 设置默认程序
+
+1. 右键单击文件，选择 **打开方式** > **选择默认程序**。
+2. 选择一个应用，自动勾选"设为默认"，单击 **确定**。
+3. 该应用将自动添加到控制中心的默认程序列表。
+
+#### 更改默认程序
+
+1. 在控制中心首页，单击 。
+2. 选择一个文件类型进入默认程序列表。
+3. 在列表中选择另一个应用程序。
+
+#### 添加默认程序
+
+1. 在控制中心首页，单击 。
+2. 选择文件类型进入默认程序列表。
+3. 单击列表下的，选择desktop文件（一般在/usr/share/applications)，或特定的二进制文件。
+4. 该程序将添加到列表，并自动设置为默认程序。
+
+#### 删除默认程序
+
+在默认程序列表中，您只能删除自己添加的应用程序，不能删除系统已经安装的应用。要删除系统已经安装的应用，只能卸载应用。卸载后该应用将自动从默认程序列表中删除。
+
+可用以下方法删除自己添加的默认程序。
+
+1. 在控制中心首页，单击 。
+2. 选择文件类型进入默认程序列表。
+3. 单击程序后面的，删除默认程序。
+
+### 个性化设置
+
+在这里，您可以设置系统主题、活动用色、字体等，改变桌面和窗口的外观，设置成您喜欢的显示风格。
+
+
+
+#### 设置窗口主题
+
+1. 在控制中心首页，单击 。
+2. 单击 **通用**，选择一种窗口主题。
+3. 该主题即为系统窗口主题。
+
+> 窍门：*自动主题表示根据当前时区的时间，根据日出日落的时间自动更换窗口主题。日出后是浅色，日落后是深色。*
+
+#### 更改活动用色
+
+活动用色是指选中某一选项时的强调色。
+
+1. 在控制中心首页，单击 。
+2. 单击 **通用**。
+3. 单击 **活动用色** 下的一种颜色，可实时查看该颜色效果。
+
+#### 设置图标主题
+
+1. 在控制中心首页，单击 。
+2. 单击 **图标主题**，选择一款图标样式。
+
+#### 设置光标主题
+
+1. 在控制中心首页，单击 。
+2. 单击 **光标主题**，选择一款光标样式。
+
+#### 更改系统字体
+
+1. 在控制中心首页，单击 。
+2. 单击 **字体**，进入设置字体界面。
+3. 设置系统字号和字体。
+
+### 网络设置
+
+登录系统后，您需要连接网络，才能接收邮件、浏览新闻、下载文件、聊天、网上购物等。
+
+> 窍门：*您可以单击任务栏托盘区的网络图标，查看当前网络状态。*
+
+
+
+#### 有线网络
+
+有线网络安全快速稳定，是最常见的网络连接方式。当您设置好路由器后，把网线两端分别插入电脑和路由器，即可连接有线网络。
+
+1. 将网线插入电脑上的网络插孔。
+2. 将网线的另一端插入路由器或网络端口。
+3. 在控制中心首页，单击 。
+4. 单击 **有线网络**，进入有线网络设置界面。
+5. 打开 **有线网卡**，开启有线网络连接功能。
+6. 当网络连接成功后，桌面右上角将弹出“已连接有线连接”的提示信息。
+
+您还可以在有线网络的设置界面，编辑或新建有线网络设置。
+
+#### 移动网络
+
+当您处于一个没有网络信号的地方时，可以使用无线上网卡来上网。在有电话信号覆盖的任何地方，无线上网卡通过运营商的移动数据网络接入宽带服务。
+
+1. 将移动网卡插入电脑上的USB接口中。
+2. 电脑将根据移动网卡和运营商信息，自动适配并自动连接网络。
+3. 在控制中心首页，单击 。
+4. 单击 **移动网络**，查看详细设置信息。
+
+#### 拨号网络
+
+拨号上网（DSL）是指通过本地电话拨号连接到网络的连接方式。配置好调制解调器，把电话线插入电脑的网络接口，创建宽带拨号连接，输入运营商提供的用户名和密码，即可拨号连接到Internet上。
+
+##### 新建拨号连接
+
+1. 在控制中心首页，单击 。
+2. 单击 **DSL**，单击 。
+3. 输入宽带名称、帐户、密码。
+4. 单击 **保存**，系统自动创建宽带连接并尝试连接。
+
+#### VPN
+
+VPN即虚拟专用网络，其主要功能是在公用网络上建立专用网络，进行加密通讯。无论您是在外地出差还是在家中办公，只要能上网就能利用VPN访问企业的内网资源。您还可以使用VPN加速访问其他国家的网站。
+
+1. 在控制中心首页，单击 。
+2. 单击 **VPN**，选择  或 。
+3. 选择VPN协议类型，并输入名称、网关、帐号、密码等信息。（导入VPN会自动填充信息）
+4. 单击 **保存**，系统自动尝试连接VPN网络。
+5. 您可以将VPN设置导出，备用或共享给其他用户。
+
+> 说明：*打开 **仅用于相对应的网络上的资源** 开关，可以不将VPN设置为默认路由，只在特定的网络资源上生效。*
+
+#### 系统代理
+
+1. 在控制中心首页，单击 。
+2. 单击 **系统代理**，进入系统代理界面。
+
+ - 单击 **无**，关闭代理服务器功能。
+ - 单击 **手动**，输入代理服务器的地址和端口信息。
+ - 单击 **自动**，输入URL，系统将自动配置代理服务器的信息。
+
+#### 应用代理
+
+1. 在控制中心首页，单击 。
+2. 单击 **应用代理**。
+3. 设置应用代理参数。
+4. 单击 **保存**。
+
+> 说明：*应用代理设置成功后，打开启动器，右键单击应用图标，可以选择 **使用代理**。*
+
+
+#### 网络详情
+
+在网络详情界面，您可以查看MAC、IP地址、网关和其他网络信息。
+
+1. 在控制中心首页，单击 。
+2. 单击 **网络详情**，进入网络信息界面。
+3. 查看当前有线网络或无线网络的信息。
+
+### 声音设置
+
+输入输出设备声音的设置（如设置扬声器和麦克风），让您听得更舒适，录音更清晰。
+
+
+
+
+#### 输出设备
+
+1. 在控制中心首页，单击 。
+2. 单击 **输出**，进入输出设备配置界面，您可以：
+ - 在输出设备后面的下拉框中选择输出设备类型。
+ - 通过拖曳滑块调节输出音量和左/右声道平衡。
+ - 打开 **音量增强**，音量的可调节区间由0~100% 转变为0~150%。
+
+#### 输入设备
+
+1. 在控制中心首页，单击 。
+2. 单击 **输入**，进入输入设备配置界面，您可以：
+ - 在输入设备后面的下拉框中选择输入设备类型。
+ - 通过拖曳滑块调节输入音量。
+ - 打开 **开启** 按钮，还可以设置 **噪音抑制** 功能。
+
+> 窍门：*通常，需要调大输入音量，确保能够听到声源的声音，但是音量不宜过大，因为这会导致声音失真。可以对着麦克风以正常说话的音量讲话，并观察反馈音量的变化，变化较明显，则说明输入音量合适。*
+
+#### 系统音效
+
+1. 在控制中心首页，单击 。
+2. 单击 **系统音效**，勾选选项，开启某一事件发生时的声音效果。
+
+> 窍门：*您可以单击试听音效。*
+
+
+### 时间日期
+
+正确选择您所在的时区，一般即可显示正确的日期和时间。您也可以手动修改时间和日期。
+
+
+
+#### 修改时区
+
+在您安装系统时，已选择了系统时区。若要修改系统时区，请按如下步骤设置。
+
+1. 在控制中心首页，单击 。
+2. 单击 **时区列表**。
+3. 单击 **修改系统时区**， 通过搜索或单击地图选择时区。
+4. 单击 **确定**。
+
+#### 添加时区
+
+您可以同时使用多个时区，以便查看另一时区的时间。
+
+1. 在控制中心首页，单击 。
+2. 单击 **时区列表**。
+3. 单击，通过搜索或单击地图选择时区。
+4. 单击 **添加**。
+
+#### 删除时区
+
+1. 在控制中心首页，单击 。
+2. 单击 **时区列表**。
+3. 单击时区列表后面的 **编辑**。
+4. 单击 ，删除已添加的时区。
+
+#### 修改时间和日期
+
+默认情况下，系统通过网络自动同步该时区的本地时间和日期。您也可以手动修改时间和日期。手动设置后，自动同步功能会被关闭。
+
+1. 在控制中心首页，单击 。
+2. 单击 **时间设置** 。
+ - 开启或关闭自动同步配置。
+ - 设置正确的时间和日期。
+3. 单击 **确定**。
+
+#### 设置时间日期格式
+
+支持即时设置时间日期的格式。
+
+1. 在控制中心首页，单击 。
+2. 单击 **格式设置**，可以设置星期、长短日期、长短时间等格式。
+
+### 电源管理
+
+对系统电源进行一些设置，让系统更安全。
+
+
+
+
+
+#### 设置显示器关闭时间
+
+1. 在控制中心首页，单击 。
+2. 单击 **使用电源**。
+3. 选择关闭显示器的时间。
+
+#### 设置自动锁屏时间
+
+1. 在控制中心首页，单击 。
+2. 单击 **使用电源**。
+3. 选择自动锁屏的时间。
+
+#### 设置电源按钮
+
+1. 在控制中心首页，单击 。
+2. 单击 **使用电源**。
+3. 选择电源按钮 **关机**、**关闭显示器** 或 **无任何操作**，更改电源设置。
+
+更改设置后会即时生效，同时系统通知用户已修改电源设置。
+
+### 鼠标
+
+鼠标是计算机的常用输入设备。使用鼠标，可以使操作更加简便快捷。
+
+
+
+#### 通用设置
+
+1. 在控制中心首页，单击 。
+2. 单击 **通用**。
+3. 开启 **左手模式**，调节鼠标和触控板的**滚动速度**，**双击速度**。
+
+> 说明：*开启左手模式后，鼠标的左右键功能互换。*
+
+#### 鼠标设置
+
+插入或连接鼠标后，在控制中心进行相关设置，让其更符合您的使用习惯。
+
+1. 在控制中心首页，单击 。
+2. 单击 **鼠标**。
+3. 调节 **指针速度**， 控制鼠标移动时指针移动的速度。
+4. 单击 **自然滚动** / **鼠标加速** 开关，开启相应功能。
+
+> 说明：
+>
+> - *开启鼠标加速，提高了指针精确度，鼠标指针在屏幕上的移动距离会根据移动速度的加快而增加。可以根据使用情况开启或关闭。*
+> - *自然滚动开启后，鼠标滚轮向下滚动，内容会向下滚动；鼠标滚轮向上滚动，内容会向上滚动。*
+
+### 键盘和语言
+
+在此模块，您可以设置键盘属性，以便符合您的输入习惯，还可以根据国家和语言调整键盘布局，设置系统语言，以及自定义快捷键。
+
+
+
+#### 键盘属性
+
+1. 在控制中心首页，单击 。
+2. 单击 **通用**。
+3. 调节 **重复延迟**/**重复速度**。
+4. 单击“请在此测试”，按下键盘上的任意字符不松开，查看调节效果。
+5. 单击 **启用数字键盘**/**大写锁定提示** 开关，开启相应功能。
+
+#### 键盘布局
+
+设置键盘布局，可以为当前语言自定义键盘。按下键盘上的按键时，键盘布局会控制哪些字符显示在屏幕上。更改键盘布局后，屏幕上的字符可能与键盘按键上的字符不相符。
+
+一般在安装系统时，就已经设置了键盘布局，您也可以添加其他的键盘布局。
+
+
+
+##### 添加键盘布局
+
+1. 在控制中心首页，单击 。
+2. 单击 **键盘布局**，进入键盘布局界面。
+3. 单击，单击某一键盘布局即可添加到列表。
+
+##### 删除键盘布局
+
+1. 在控制中心首页，单击 。
+2. 单击 **键盘布局**，进入键盘布局界面。
+3. 单击”键盘布局“后的 **编辑**。
+4. 单击 ，删除该键盘布局。
+
+##### 切换键盘布局
+
+1. 在控制中心首页，单击 。
+2. 单击 **键盘布局**，进入键盘布局界面。
+3. 选择一个键盘布局进行切换。
+4. 切换成功后，该键盘布局将标记为已选择。
+
+> 窍门：*您也可以选择一组或多组快捷键，按顺序切换已添加的键盘布局。选择 **切换方式**， 让切换后的键盘布局应用于整个系统或当前应用。*
+
+#### 系统语言
+
+系统语言默认为您安装系统时所选择的语言，可以随时更改。
+
+##### 添加系统语言
+
+您可以添加多个语言到系统语言列表，以便切换系统语言。
+
+1. 在控制中心首页，单击 。
+2. 单击 **系统语言**，进入系统语言界面。
+3. 单击  进入语言列表。
+4. 选择语言，该语言将自动添加到系统语言列表。
+
+##### 切换系统语言
+
+1. 在控制中心首页，单击 。
+2. 单击 **系统语言**，进入系统语言界面。
+3. 选择要切换的语言，系统将自动开始安装语言包。
+4. 语言包安装完成后，需要注销后重新登录，以便设置生效。
+
+> 注意：*更改系统语言后，键盘布局可能也会发生改变。重新登录时，请确保使用正确的键盘布局来输入密码。*
+
+
+#### 快捷键
+
+快捷键列表显示了系统所有的快捷键。您可以在这里查看、修改和自定义快捷键。
+
+
+
+##### 查看快捷键
+
+1. 在控制中心首页，单击 。
+2. 单击 **快捷键**，进入快捷键设置界面。
+3. 搜索或查看默认的系统快捷键、窗口快捷键和工作区快捷键。
+
+##### 修改快捷键
+
+1. 在控制中心首页，单击 。
+2. 单击 **快捷键**，进入快捷键设置界面。
+3. 单击需要修改的快捷键。
+4. 使用键盘输入新的快捷键。
+
+> 窍门：*若要禁用快捷键，请按下键盘上的 。若要取消修改快捷键，按下键盘上 **Esc** 键， 或单击下方的”恢复默认”按钮。*
+
+##### 自定义快捷键
+
+您可以为常用的应用自定义一个快捷键。
+
+1. 在控制中心首页，单击 。
+2. 单击 **快捷键**。
+3. 单击，进入添加快捷键界面。
+4. 输入快捷键名称、命令和快捷键。
+5. 单击 **添加**。
+6. 添加成功后，单击”自定义快捷键“后的 **编辑**。
+7. 单击某个快捷键后 ， 删除自定义的快捷键。
+
+> 窍门：*若要修改快捷键，单击输入新的快捷键即可。若要修改自定义快捷键的名称和命令，单击“自定义快捷键”后的 **编辑** ，单击快捷键名称后的 ，进入修改页面。*
+
+
+### 系统信息
+
+您可以查看系统版本、版本授权和电脑硬件等信息，以及该系统的一些协议。
+
+
+
+#### 关于本机
+
+1. 在控制中心首页，单击 。
+2. 在 **关于本机** 下，您可以查看当前系统版本、版本授权及电脑硬件信息；
+3. 若系统未激活，可在此页面单击 **激活**，进行系统激活。
+
+#### 版本协议
+
+1. 在控制中心首页，单击 。
+2. 在 **版本协议** 下，查看系统版本协议。
+
+#### 最终用户许可协议
+
+1. 在控制中心首页，单击 。
+2. 在 **最终用户许可协议** 下，查看最终用户许可协议。
+
+
+
+## 键盘交互
+
+您可以使用键盘在各个界面区域内切换，并选择对象，执行操作。
+
+| 按键 | 功能 |
+| :----------------------------------------------------------- | :----------------------------------------------------------- |
+| **Tab** | 在不同区域或对话框按钮之间切换。 |
+|     | 在同区域内对不同的对象进行选择。使用  进入下级菜单,使用  返回上级菜单。使用 键进行上下切换 。 |
+| **Enter** | 执行选定对象。 |
+| **Space** | 在文件管理器中，预览选定对象；在影院和音乐中，开始/暂停播放；在下拉列表中，展开下拉选项（也可使用回车键）。 |
+| **Ctrl**+**M** | 打开右键菜单。 |
+
diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/+.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/+.svg
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+
+
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+
+
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+
+
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+
+
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new file mode 100755
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+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/Backspace.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/Backspace.svg
new file mode 100755
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@@ -0,0 +1,18 @@
+
+
\ No newline at end of file
diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/Ctrl.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/Ctrl.svg
new file mode 100755
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@@ -0,0 +1,16 @@
+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/D.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/D.svg
new file mode 100755
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+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/Down.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/Down.svg
new file mode 100755
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+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/End.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/End.svg
new file mode 100755
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+
+
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new file mode 100755
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+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/Esc.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/Esc.svg
new file mode 100755
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@@ -0,0 +1,17 @@
+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/F1.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/F1.svg
new file mode 100755
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+
+
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new file mode 100755
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+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/F7.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/F7.svg
new file mode 100755
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+
+
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diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/L.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/L.svg
new file mode 100755
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+
+
\ No newline at end of file
diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/Left.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/Left.svg
new file mode 100755
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@@ -0,0 +1,13 @@
+
+
\ No newline at end of file
diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/M.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/M.svg
new file mode 100755
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+
+
\ No newline at end of file
diff --git a/docs/zh/docs/userguide/images/dde/zh_CN/icon/O.svg b/docs/zh/docs/userguide/images/dde/zh_CN/icon/O.svg
new file mode 100755
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index 0000000000000000000000000000000000000000..b44bdce723c760af74dddb4ba3f3a79fa5809137
--- /dev/null
+++ b/docs/zh/docs/userguide/images/dde/zh_CN/jpg/sources.txt
@@ -0,0 +1,233 @@
+ for i in *.svg; do inkscape $i --export-png=`echo $i | sed -e 's/svg$/png/'`; done
+
+
+sudo apt-get update && sudo apt-get dist-upgrade
+
+
+sudo apt-get install package
+
+
+
+
+
+
+
+@
+
+sudo deepin-editor /etc/hosts
+
+#127.0.0.1 localhost
+#127.0.1.1 minn-PC
+
+# The following lines are desirable for IPv6 capable hosts
+# ::1 localhost ip6-localhost ip6-loopback
+# fe00::0 ip6-localnet
+# ff00::0 ip6-mcastprefix
+# ff02::1 ip6-allnodes
+# ff02::2 ip6-allrouters
+
+
+
+10.0.10.27 test.manager.platform.deepin.com
+10.0.10.27 test.dcmc.platform.deepin.com
+10.0.10.27 test.notification.platform.deepin.com
+10.0.10.27 test.login.platform.deepin.com
+10.0.10.27 test.oauth.platform.deepin.com
+
+10.0.10.27 dev.account.chinauos.com
+10.0.10.27 dev.www.chinauos.com
+10.0.10.27 dev.doc.chinauos.com
+10.0.10.27 dev.download.chinauos.com
+10.0.10.27 dev.bbs.chinauos.com
+
+10.0.10.27 dev.api.chinauos.com
+10.0.10.27 dev.login.chinauos.com
+10.0.10.27 dev.sync.chinauos.com
+10.0.10.27 dev.certify.chinauos.com
+10.0.10.27 dev.store.chinauos.com
+10.0.10.27 dev.push.chinauos.com
+10.0.10.27 dev.storage.chinauos.com
+
+#线上服务
+10.0.10.27 test.notification.platform.deepin.com
+10.0.10.27 test.manager.platform.deepin.com
+10.0.10.27 test.login.platform.deepin.com
+10.0.10.27 test.dcmc.platform.deepin.com
+
+
+
+
+
+
+
+
+
+
+
+
+@
+
+sudo deepin-editor /etc/environment
+
+DEEPINID_OAUTH_URI=http://dev.login.chinauos.com
+DEEPIN_SYNC_SERVER_API=http://dev.sync.chinauos.com/api/v1
+DEEPIN_PUSH_SERVER_API=dev.push.chinauos.com/hub/lookup
+DEEPIN_DEEPINID_OAUTH_URI=http://dev.login.chinauos.com
+DEEPIN_DEEPINID_REDIRECT_URI=http://dev.sync.chinauos.com/oauth/callback
+
+
+
+
+
+@
+
+sudo deepin-editor /usr/share/deepin-app-store/settings.ini
+
+[General]
+
+# Support aot. Only open it if you use aot data package
+SupportAot = true
+
+# Allow user sign in.
+SupportSignIn = true
+
+# Base url to metadata server.
+Server = "https://store.chinauos.com"
+
+# After 5.3, store will auto change region by ip.
+# Allow change Region
+AllowSwitchRegion = false
+
+# Default operation region.
+DefaultRegion = "Default"
+
+# Show support by upyun if you use CDN.
+UpyunBannerVisible = true
+
+
+
+
+
+
+
+@
+
+sudo deepin-editor /etc/apt/sources.list
+
+## Generated by deepin-installer
+#deb [by-hash=force] https://packages.chinauos.cn/uos eagle main contrib non-free
+#deb-src https://packages.chinauos.cn/uos eagle main contrib non-free
+
+# deb http://pools.corp.deepin.com/debian-buster buster main contrib non-free
+# deb http://pools.corp.deepin.com/ppa/dde-eagle eagle main contrib non-free
+# deb http://pools.corp.deepin.com/ppa/dde-eagle experimental main
+
+# deb [trusted=true] http://shuttle.corp.deepin.com/cache/repos/eagle/release-candidate/5pyN5Yqh5LiO5pSv5oyB/ unstable main
+
+
+# deb-src [by-hash=force] http://pools.corp.deepin.com/debian-buster stable main contrib non-free
+# deb [by-hash=force] http://pools.corp.deepin.com/ppa/dde-eagle eagle main contrib non-free
+# deb-src [by-hash=force] http://pools.corp.deepin.com/ppa/dde-eagle eagle main contrib non-free
+
+# deb http://pools.corp.deepin.com/ppa/dde-eagle experimental main
+# deb-src http://pools.corp.deepin.com/ppa/dde-eagle experimental main
+# deb http://10.0.10.27:15080/appstore eagle appstore
+
+
+
+#外网可访问地址：
+
+#(此域名为官方主仓库，需要通过授权管理工具激活，方可使用)
+deb https://packages.chianuos.cn/uos eagle main contrib non-free
+
+#(此域名为无权限验证主仓库，与1仓库一致)
+deb https://uos.packages.chinauos.com/uos eagle main contrib non-free
+
+#(此仓库为外网可访问的内部稳定ppa仓库，通常情况下集成申请单通过会合并到此仓库)
+deb https://pools.deepin.cn/ppa/dde-eagle eagle main contrib non-free
+
+#(此仓库为外网可访问的内部测试ppa仓库，通常情况下commit合并后打包会进入此仓库)
+deb https://pools.deepin.cn/ppa/dde-eagle experimental main contrib non-free
+
+
+
+#内网可访问地址：
+
+#(此仓库为内网主仓库，内容等价于1,2仓库)
+# deb http://10.0.10.25/uos/ eagle main contrib non-free
+
+deb http://10.0.10.27:15080/appstore eagle appstore
+
+deb [trusted=yes] http://10.0.32.52:5002/public-repos/eagle/release-candidate/Q0TlvIDlj5HmtYvor5U/ unstable main
+
+#(此仓库为内网稳定ppa仓库，内容等价于3)
+deb http://pools.corp.deepin.com/ppa/dde-eagle eagle main contrib non-free
+
+#(此仓库为内网测试ppa仓库，内容等价于4)
+deb http://pools.corp.deepin.com/ppa/dde-eagle experimental main contrib non-free
+
+
+
+#外网开发环境配置：
+
+# deb https://uos.packages.chinauos.com/uos eagle main contrib non-free
+# deb https://pools.deepin.cn/ppa/dde-eagle eagle main contrib non-free
+# deb https://pools.deepin.cn/ppa/dde-eagle experimental main contrib non-free
+
+
+
+#内网开发环境（vpn连接内网）
+
+# deb http://10.0.10.25/uos eagle main contrib non-free
+# deb http://pools.corp.deepin.com/ppa/dde-eagle eagle main contrib non-free
+# deb http://pools.corp.deepin.com/ppa/dde-eagle experimental main contrib non-free
+
+
+
+######################################################################################
+## Generated by deepin-installer
+#deb [by-hash=force] https://packages.chinauos.cn/uos eagle main contrib non-free
+#deb-src https://packages.chinauos.cn/uos eagle main contrib non-free
+
+
+#专业版原内网仓库地址：
+
+ deb http://pools.corp.deepin.com/ppa/dde-eagle eagle main contirb non-free
+
+ deb http://10.0.10.25/uos eagle main contrib non-free
+
+
+
+#专业版新内网仓库地址:
+
+ deb http://pools.uniontech.com/ppa/dde-eagle eagle main contrib non-free
+
+ deb http://pools.uniontech.com/uos eagle main contrib non-free
+
+
+
+#专业版外网无验证可访问仓库地址：
+
+ deb https://pools.deepin.cn/ppa/dde-eagle eagle main contrib non-free
+
+ deb https://pools.deepin.cn/uos eagle main contrib non-free
+
+ deb https://uos.packages.chinauos.com/uos eagle main contrib non-free
+
+#qx
+
+deb [trusted=yes] https://shuttle.deepin.com/cache/repos/nonfree-eagle/release-candidate/5qGM6Z2i5LiT5Lia54mIU1AxdXBkYXRlMeesrOS6jOi9rua1i-ivlTM0Nw/ unstable main
+
+
+
+
+
+
+
+@
+
+sudo deepin-editor /etc/apt/sources.list.d/appstore.list
+
+deb https://store.chinauos.com/appstore eagle appstore
+
+deb http://10.0.10.27:15080/appstore eagle appstore
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