This feature request is related to Ticket 1435779

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Currently, there's no support for increasing the drag threshold for the items on the orange box. Even after setting the values below.

DragDropManager.MinimumHorizontalDragDistance = 5000;
DragDropManager.MinimumVerticalDragDistance = 5000;

It would also be beneficial if instead of just relying on the drag threshold which is the box. Add a support for a sort of "Drag Time" concept where we can define how long the user should've held the actual pane before dragging/going outside the threshold.

When a RadSplitContainer with Orientation="Vertical" contains RadPaneGroup instances, resizing them causes a flicker when the ShowResizePreview property is set to False. This happens with the VisualStudio2019 theme.

For the time being, a possible workaround is to create a global Style with TargetType="RadPaneGroup" and set the Margin property to "0":

<Style TargetType="telerik:RadPaneGroup" BasedOn="{StaticResource RadPaneGroupStyle}">
    <Setter Property="Margin" Value="0"/>
</Style>

The DataContext of RadPane's content is lost when showing its preview in the DockingNavigator.

As a workaround, you could set the DataContext of the content element could be set explicitly.

Place one RadPane in a RadPaneGroup. Bind IsHidden property of this RadPane, and set the default value to True. If you change it to False, the width of the AutoHide area is not set to the correct one.

It happens when the Pane is dragged and dropped not on the Compass several times, quickly.

Initially HeaderDropDownMenu button is shown on window's caption bar of docked RadPanes but after undocking that button mysteriously disappears. The RadPane is still "Dockable" but for some reason there is no HeaderDropDownMenu button on it. This behavior leads to user confusion.

 With code below the radPane will remain hidden (radPane is floating pane):radPane.IsHidden = true; radPane.IsHidden = false;

Available in LIB version 2016.2.530, it will be also available in the 2016 R2 SP1.

Open a Window from a button placed inside the unpinned pane. The pane does not hide and the window is shown below it.

An access key can be added to ContentPresenter in WPF if you add underscore in the content and set RecognizeAccessKey to true.If the ContentPresenter is inside DocumentHost, the access key is working, but the underscore in the UI is not visible. If you remove the DocumentHost everything works as expected.

The RadOutlookBar control takes a significant amount of time to load initially when it does not have a fixed width and its IsMinimized property is explicitly set to True.

A possible workaround, for the time being, is to set a fixed Width for the control and change its value in the Minimized and Restored events.

Loading a layout containing a single empty RadPaneGroup inside the DocumentHost causes the IsInDocumentHost property of the group to return false.

Available in LIB version 2016.3.1017, it will be also available in the 2016 R3 SP1 release. 

Resizing a RadPane's splitter while its Header's or Content's ContextMenu is opened leads to incorrect resize

Available in LIB version 2016.1.411, it will be also available in the 2016 R2 release.

Changing the theme at runtime causes any horizontal ScrollBar inside the content of a RadPane to be scrolled to its end

Available with the 2015 Q3 release.