Disabling the Emacs menubar, toolbar, or scrollbar

1. To disable the menu bar, place the following line in your .emacs file:
   (menu-bar-mode -1)
   
2. To disable the scrollbar, use the following line:
   (scroll-bar-mode -1)
   
3. To disable the toolbar, use the following line:
   (tool-bar-mode -1)
   

Note: If, after turning any of these off, you want to re-enable them for a single emacs window, you can do so by pressing Meta-x and then typing the command at the M-x prompt.

Example:
M-x tool-bar-mode
will turn the toolbar back on.

Note: All of these commands are "toggles", so repeated use of the command will turn the feature in question on or off.