Mask                   <Amiga-M>
The  Mask function is one of the most
powerful features of a computer paint
program.   In  the  world of material
art  the ability to mask off portions
of  an  image  is  used  by  airbrush
artists,  professional photographers,
printers, and even sign makers.  With
the  help  of the mask function it is
easily  possible to separate a person
from  any  type of background or even
to  change  the color of the sky from
blue  to  orange.   One  of  the more
difficult  features to master but one
of the most rewarding!

In  the  first line of this requester
you  determine  the  kind of mask you
wish   to  use  by  the  two  buttons
located at the top of the screen.  By
selecting  ´Non'  you  turn  all mask
features  off.   If  for  example you
want to change only one color in your
image  but  it  is  interspersed  you
should  choose  ´One'.   And  if  you
prefer  to  work with a Color Look Up
Table  choose  ´CLUT'.   To  select a
certain color out of the color range,
select  ´Hue'.   You  may  also build
masks  using  ´Value' or ´Saturation'
masks,  these  masks  work  using the
selected brightness or saturation.