If you have problems controlling a mouse or simply prefer to keep your hands on the keyboard at all times,GNOME provides several special key sequences that enable you to perform most traditionally mouse-driven keyboard shortcuts. To activate desktop activities using only the keyboard. These are commonly referred to as these, press and hold down the first key in the sequence while pressing the second. The most popular key-board shortcuts for the GNOME desktop are the following:
Alt+F1: Displays the Applications menu.
Alt+F2: Displays the Run Applications dialog, in which you can enter the name of a specific
                application that you want to execute.
Alt+F4: Closes the window that is currently selected.
Alt+F5: Reduces the size of the current window if it is maximized.
Alt+F7: Enables you to move the window that is currently selected. After pressing this key com-
          bination, use the arrow keys to move the window to a new location and press any other key         
          on the keyboard to complete the move operation.
Alt+F8: Enables you to resize the window that is currently selected. After pressing this key com-
            bination, use the arrow keys to increase or decrease the size of the window and press any 
            other  key on the keyboard to complete the resize operation.
Alt+F9: Minimizes the window that is currently selected.
Alt+F10: Maximizes the window that is currently selected.
Alt+Tab: Cycles through all of the windows and dialogs that are currently displayed on the
            screen, highlighting each in turn (known as giving the focus to that window) until you find 
            the one that you are interested in
Alt+Spacebar: Displays any context-sensitive menu associated with the window that is currently
            selected.
Control+l:When browsing for a file in any File Open dialog, displays a pop-up box in which
            you can type the full pathname of the directory containing the files that you are looking for, 
            saving you many clicks if you need to drill down to a deeply-nested directory. This dialog 
          does automatic directory-name completion as you type, and is one of my personal favorite 
            GNOME features.
GNOME supports several other keyboard shortcuts, most of which perform standard actions within various  applications. For a complete list of available keyboard shortcuts, see the GNOME Accessibility Guide, available by selecting the System —〉 Help —〉System Documentation menu item.