This Idea has been created on the behalf on one user.
Currently, Revit Addins developers have the choice to either create a new customize tab and place their add-in there or use the existing “Add-Ins” tab in REVIT and place the add-in in the external tool menu.
On the end user side, it is not possible to customize the addins position within the user interface (UI).
The idea would be to allow the possibility to create customized tabs and move addins features across tabs so users can have more flexibility in UI customization.