Intuition screens are the basis of any display Intuition can make.
Screens determine the fundamental characteristics of the display such as
the resolution and palette and they set up the environment for multiple,
overlapping windows that makes it possible for each application to have
its own separate visual context.  This chapter shows how to use existing
screens and how to create new screens.

 types of screens            overscan and the display clip 
 screen data structures      intuition screens and the graphics library 
 custom screen functions     advanced screen programming 
 public screen functions     other screen functions 
 drawinfo and the 3d look    function reference