To open the Menu Set Editor, select the Status Line drop-down list and select Customize.
From the Menu Set Editor, you can create, edit, rename, remove, and restore menu sets.
Creates a new menu set.
Renames the currently selected menu set.
Removes the currently selected menu set.
Restores the menu set to its default state. This option is available if the menu set currently selected in the Menu Sets column is one of the default Maya menu sets (the Animation, Polygons, NURBS, and Shading menu sets).
Restores the default Maya menu sets (the Animation, Polygons, NURBS, and Shading menu sets), while preserving any custom menu sets that have been added.