How to Customize PowerPoint Toolbars and Commands?
Customize Option, from the 'Tools' menu can be used to personalize toolbars, commands in powerpoint.
By checking the approiate toolbar they appear on the top, commands can be dragged on to the to the toolbar. Customizing Toolbars and Commands in Microsoft PowerPoint 2002
Click on Customize -> Toolbars to display the list of tools available.
Click on Customize -> Commands to display the list of available commands.
In the above example, '3D Settings' toolbar is added and removed from the toolbar.
From the 'Commands' tab the 'Eraser' command is dragged on to the toolbar.
Display settings of the toolbar is changed using the 'Options' tab settings.