Follow these steps to create Ribbon Tab Groups:

  1. Add RibbonControl to the form.
  2. Select the RibbonTabItem2 that is created by default.
  3. In VS.NET Property window find Group property and select it
  4. Click the drop-down button for Group property and choose Create New Group
  5. Select RibbonControl and in Property VS.NET window ensure that TabGroupsVisible property is set to true

Note that Tab Groups will be displayed only if there is space above the tab to show the group. If Quick Access Toolbar extends over the tab then group will not be rendered.