Task to show previously marked objects (galaxies and/or stars), defects
(pixels affected by cosmic ray hits and/or CCD defects or other
blemishes), or other arbitrary regions on the image display. Positions
and/or regions are read from files 'galfile', 'starfile', 'crfile', and
'delfile', whose names are formed by appending '.pos.gal', '.pos.star',
'.pos.cosmic' and '.pos.del' to the root of the input image name. It is
also possible to show arbitrary regions listed in file whose name or
whose extension is specified explicitly (i.e., if the default naming
convention is not followed, or if objects/features other than galaxies,
stars, cosmics and defects/blemishes need to be indicated on an image.
Each type of region is overlayed on the image display using a different
color (white, red, blue and yellow are the default colors used to indicate
galaxies, stars, pixels affected by cosmic rays, and defects/blemishes;
magenta [regclr=212] is the default color for arbitrary regions).
If the coordinates in the regions files correspond to, e.g., an image
taken with a back-illumated CCD device, and the image has since then
been transposed to have North up and East to the left, one may specify
'dotransp=yes' to mark the regions.