Click the Customize Quick Access Toolbar list arrow,
and then click More Commands.
Click the Choose commands from list arrow,
and then click All Commands or a specific Ribbon.
Click For all documents.
To add, click the command from the left column. Click Add
To remove, click the command from the right column and click Remove.
Click Separator, and then click Add to insert a separator line between buttons.
Click the Move Up and Move Down arrow buttons to arrange the order.