[Expand]General Information
[Expand]WinForms Controls
[Collapse]ASP.NET Controls and MVC Extensions
 [Expand]What's Installed
 [Expand]Common Concepts
 [Collapse]ASP.NET WebForms Controls
   Getting Started
  [Expand]Grid View
  [Expand]Tree List
  [Expand]Card View
  [Expand]Chart Control
  [Expand]Pivot Grid
  [Collapse]Rich Text Editor
   [Expand]Product Information
    Getting Started
     ASPxRichEdit Control
     Supported Document Formats
     Import and Export
     Print Documents
     Formatting Characters
     Formatting Paragraphs
     Mail Merge
     Simple View
     Table of Contents
     Spell Checking
    [Expand]Client API
    [Expand]Built-in Dialogs
     HTML Tag Interpretation
     Keyboard Shortcuts
  [Expand]Site Navigation and Layout
  [Expand]HTML Editor
  [Expand]Vertical Grid
  [Expand]Data Editors
  [Expand]Docking and Popups
  [Expand]File Management
  [Expand]Data and Image Navigation
  [Expand]Multi-Use Site Controls
  [Expand]Spell Checker
  [Expand]Query Builder
 [Expand]ASP.NET MVC Extensions
 [Expand]Redistribution and Deployment
  Get More Help
 [Expand]API Reference
[Expand]ASP.NET Bootstrap Controls
[Expand]ASP.NET Core Bootstrap Controls
[Expand]WPF Controls
[Expand]Xamarin Controls
[Expand]Windows 10 App Controls
[Expand]Office File API
[Expand]Report and Dashboard Server
[Expand]eXpressApp Framework
[Expand]eXpress Persistent Objects
[Expand]CodeRush Classic
[Expand]Cross-Platform Core Libraries
[Expand]Tools and Utilities
 End-User Documentation
View this topic on docs.devexpress.com (Learn more)


The DevExpress ASP.NET Rich Edit provides the following features that you can use to adapt the control to a mobile browser's window:

Expanded Full-Screen Mode

The ASPxRichEdit's full-screen mode extends the control to the browser's client area that frees extra space for the editor's zone within a mobile device's window.

End-users can activate full-screen mode by clicking the Full Screen ribbon's button (or by pressing F11 for desktop) when the editor has focus. You can switch the Rich Edit to the full-screen mode by executing the RichEditCommands.setFullscreen client command.


We recommend adding the following meta tag to the HTML document's head section to stabilize displaying RichEdit in the full-screen mode on mobile devices:

<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">

This tag defines a viewport’s settings for mobile browsers. Some web pages do not fit a mobile browser's window, so it scales pages down to display them entirely within the viewport and enables end-users to scale up them. When Rich Edit is switched to the full-screen mode on mobile devices, it occupies the area that should be visible within the viewport's default scale. If a page contains additional content that increases the page's width and can be scaled down, the Rich Edit control in full-screen mode does not occupy the scaled viewport's zone entirely.

The meta tag above stretches the page's content to the viewport's width and disables automatic and custom scaling to prevent the described issue.

Expanded One Line Ribbon

The built-in ribbon's one line mode can display all items within an active tab in one line to make the ribbon compact.

The ASPxRichEdit.RibbonMode property maintains the ribbon's mode. The default value (RichEditRibbonMode.Auto) enables the control to display a corresponding ribbon automatically depending on the browser type: a standard ribbon is used for desktop browsers, and a one-line ribbon is used for mobile devices' browsers.

Online Demo

Ribbon Customization

Expanded Adaptive dialogs

Each Rich Edit's built-in dialog is adaptive: it adjusts content to fit the mobile browser window:

The File Dialogs inherit adaptivity settings from the File Manager control. Use the RichEditDocumentSelectorSettings.ToolbarSettings property to access the FileManagerSettingsToolbar class's instance that allows you to define the following toolbar settings:

Member Description
FileManagerSettingsToolbar.SettingsAdaptivity Provides access to the file manager's adaptivity settings.
FileManagerSettingsToolbar.AdaptiveToolbarImage Gets the settings of an image displayed in an adaptive ASPxFileManager's toolbar, when it contains hidden items.
FileManagerSettingsToolbar.ExpandFolderContainerButtonSettings Provides access to the Expand Folder Container button settings.

Is this topic helpful?​​​​​​​