I found the property UltraTabControlBase.InterTabSpacing, but I am not able to set through the UltraDockManager and UltraTabbedMdiManager. Our visual designer will like to add more spacing between all the tabs, but I do not see a way to do this through the managers.  Ideally, there should be at least two properties we can set through the managers.  One is the existing InterTabSpacing and the second will be padding within the tab itself.  If borders are shown in the tabs, InterTabSpacing adds spacing between the borders so you see a gap between the tabs.  I will also like to be able to specify space inside the borders.  Similar to specifying the padding of a WPF control.