colors in bitmaps
CorelDRAW lets you
change colors in monochrome images, apply PostScript halftone screens to
optimize color and black-and-white bitmaps for printing, hide and show colors,
and mask colors. Monochrome bitmaps have two colors: black and white. You can
replace the black and white pixels with any color on a color palette.
If you plan to print
to a PostScript printer, you can optimize color or black-and-white printing by
applying a halftone screen to an image. Halftone screens break down an image
into small dots or lines for clearer printing, continuous tones, and special
effects. However, you can only see the screen's effect on the bitmap after you
print it on a PostScript printer. For information about making changes to
halftone screens, see "To customize a halftone screen."
You can hide and
display selected colors by masking them. Hiding colors in a bitmap lets objects
or backgrounds show through the image. Hiding a color can also alter the
apparent shape of a bitmap. For example, if a bitmap shows a person on a black
background, you can hide the background so that the bitmap appears to take on
the shape of the person rather than a rectangular shape. Also, hiding colors in
bitmaps can increase the speed at which objects are rendered on the screen. You
can also display certain colors in a bitmap to change the image's appearance or
see where a particular color has been applied. You can mask as many as 10 colors
in a bitmap.
Color masking also
lets you change selected colors without altering the other colors in an image.
You can also save a bitmap color mask to a file and open the file for future