Microsoft Office has easy access tabs for commands. Some of these commands are useful, others are rarely used, and some commands you might need are not shown. To customize what commands are displayed in the ribbon, first open the Office Program you would like to edit. Go to File, then select Options. Next select Customize Ribbon on the left hand side of the dialogue box. From here you can add or remove commands from the toolbar.
Knowledgebase Article: http://helpdesk.etown.edu/helpconsole2012/KB/default.aspx#pageid=customize_the_ribbon