The attached project demonstrates a possible approach for handling this - by editing RadRibbonWindow's control template and specifying a converter for the PART_Icon Image's Width and Height bindings. The converter in turn takes into account the DPI of the current monitor.

Currently, a ScreenTip is opened 500 milliseconds after you hover the associated item. This is a hardcoded value that cannot be changed. Add a property to change this. For example another attached property in the ScreenTip class.

For example: ScreenTip.InitialShowDelay="1000"

The backstage of the RadRibbonView cannot be opened when the control is placed inside a WinForms application. 

Currently, the minimized content of the ribbon opens up in a Popup element which leads to issues when positioned between two (or more) monitors. Introduce a feature that allows the content to opens in an Adorner element. 

Expose a property to control the visibility of the backstage back button.

Please support the new Office Simplified Ribbon: https://support.office.com/en-us/article/use-the-simplified-ribbon-44bef9c3-295d-4092-b7f0-f471fa629a98?ui=en-US&rs=en-US&ad=US.

Close command needed when using the close button

The command could be intersected as follow: 
 static MainWindow()
{
      RadRibbonWindow.IsWindowsThemeEnabled = false;
       CommandManager.RegisterClassCommandBinding(typeof(MainWindow), new CommandBinding(Telerik.Windows.Controls.RibbonView.Shell.SystemCommands.CloseWindowCommand, CloseWindowExecuted, canExecute));
}

Please note that this command is available only if RadRibbonWindow.IsWindowsThemeEnabled is set to "false".

Available in R1 2017 Release

Add an way to include the Microsoft standard "Press F1 for help" to screentips in the ribbon, including the behavior to perform an action when the F1 key is pressed.

UPDATE: The RibbonView exposes a HelpCommand property which basically sets the Help button command. Additionally the Help button has a predefined ScreenTip which content is controlled by the “RibbonViewHelp” resource key. You can easily change the value returned by the ResourceManager for that resource key to change the default ScreenTip information.

As for performing a custom action on F1, this is considered application logic which can easily be implemented through InputBindings (http://msdn.microsoft.com/en-us/library/system.windows.uielement.inputbindings%28v=vs.110%29.aspx).

Available in LIB version: 2016.1.21

Black bar apears on Windows10 machine when in Maximized state and the RadRibbonView has set Visibility="Collapsed".

Available in LIB version: 2016.1.21

Items in RadCollapsible are not rendered correctly on Windows7 with DPI 150% and UseLayoutRounding set to true and ItemSpacing is set to more than 0.

Available in LIB version: 2015.3.1215

Extend the focus navigation in the control to match the MS Office navigation

Will be available in Q3 2015 Release

If a contextual tab is collapsed when the contextual group is activated and then its visibility is set to Visible, the tab is not shown (only if you reopen the group).

Available in LIB version: 2015.2.803

RibbonView: А System.InvalidOperationException is thrown when  RadDocumentPane is selected and the ribbon is minimized and its popup is open.

Available in LIB Version: 2015.2.720.

A binding error occur in the output on Windows7 without aero.
(System.Windows.Data Information: 10 : Cannot retrieve value using the binding and no valid fallback value exists; using default instead. BindingExpression:Path=IsActive; DataItem=null; target element is 'Button' (Name='PART_MinimizeWindowButton'); target property is 'NoTarget' (type 'Object'))

Available in LIB version: 2015.1.0604

WindowChrome is not updated after dynamic theme change on Windows7(from Aero to NonAero)

Will be available in Q1 2015 SP.

RibbonSplitButton have different width in its dissable state compared to its normal state.

The fix is available in Q1 2015 SP Release.

Available in LIB version: 2015.1.2303

A recursive call to Automation Peer API is not valid exception is thrown


Available in LIB version: 2014.3.1215