 This tool is used to fill an
 enclosed area with the currently
 selected color. 
  To use Fill just click the mouse in
 the area you want to fill. A fill
 operation can be stopped at any time by
 pressing any key other than the Open
 Apple, Control or Option.
  If you are using more than one color
 palette, Fill will treat a line that
 has a different color palette than the
 one that the fill was started on as the
 upper or lower boundry of the area to
 be filled. The reason for this is to
 prevent unexpected fills, since you may
 tend to forget where one color palette
 starts and one leaves off. 
