Customising Gnome 2.x Menus
Once you have installed a modest amount of software, you may find your menus become large and unwieldy. In Ubuntu 10.x, you can hide or show the menu options you desire, using the option:
System → Preferences → Main Menu:
This will display a dialogue box allowing you to configure which menu options are displayed:
To hide a menu entry, simply uncheck (-untick) the Show column entry next to that item; to display it again, simply re-check the box in the Show column.
You can change the order a menu option appears in by selecting that option, then using the Move Up and Move Down buttons until the desired position is reached. You can also add separators, new items - or delete items permanently. Indeed, you can even add entire new menus - for example, to list your favourite applications under.
When you have finished making changes to the menu system, simply click the "Close" key to apply the changes -or the "Revert" key to discard them- and the dialogue box will close.