You can't add, delete, or reset a shortcut menu in Microsoft Office. However, you can modify a command image, rename a command, display an icon and text for a command, and move or copy commands to or from a shortcut menu just as you can for any other menu in Office.
Delete a command from a shortcut menu
Click a category on the Shortcut Menu toolbar, and then click the shortcut menu that contains the command.
Drag the command off the menu.
Add a command to a shortcut menu
Click a category on the Shortcut Menu toolbar, and then click the shortcut menu you want to modify.
In the Customize dialog box, click the Commands tab.
In the Categories box, click a category for the command.
Drag the command from the Commands box to where you want it to appear on the shortcut menu, and then release the mouse.