From the editor, you can create, edit, rename, remove, and restore menu sets.
editor menus
menu
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Renames the currently selected menu set.
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Removes the currently selected menu set.
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Restores the menu set to its default state. This option is available if the menu set currently selected in the column is one of the default Maya menu sets (the , , , ,, and menu sets).
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Restores the default Maya menu sets (the , , , , , and menu sets), while preserving any custom menu sets that have been added.