By default while dragging a dockable object its content is visible. But sometimes to improve the performance and allow for easy and smooth dragging it is better to drag an empty box with a border and background.

To disable the content while dragging you may set the RadDockingManager.ShowContentWhileDragging to false (by default is true).

To disable the tool tip that shows an info for the dockable object that is currently dragging you may use RadDockingManager.ShowToolTipWhileDragging. By default the tool tip is enabled (by default is true).