Rubout  [Eraser or Fixed area (Area, Block, Line or Screen)]
       Type R then select Fixed area or Eraser (default).
 Eraser: [E]  (default)
   Ten eraser sizes are available from the window menu.  The default size
   is 5.  The eraser appears as a box.  Move the eraser with the cursor
   device.   Press SPACEBAR (or Left Button on mouse) to rubout
   an area the size of the selected eraser.  Press "/" to leave the eraser
   set ON. (Eraser rubs out automatically when moved. ESC for the DRAW menu.
 Fixed area: [F]
   Select F then move the cursor to the location required by the type of
   erasure :
    Area:  Locate cursor within a painted area then press: SPACEBAR then A.
    Block: Move cursor to the lower left corner of the block to be erased then
           press SPACEBAR then B.
    Screen: Press SPACEBAR then S.
March 07, 1987