Here are a few simple examples of the use of this task.
makethumbs imageset=P0123456789M1S001IMAGE_8000.FIT withsrclist=no outfilename=out.gif ra=123.45 dec=-67.89
makethumbs imageset=P0123456789M1S001IMAGE_8000.FIT srcnum=5 cattab='cat2xmm.fits:SRCLIST' withsrclist=no outfilename=out.gif
makethumbs imageset=P0123456789M1S001IMAGE_8000.FIT srclisttab='P0123456789EPX000OBSMLI0000.FIT:SRCLIST' srcnum=5 gifroot='m1image_'
makethumbs imageset=P0123456789M1S001IMAGE_8000.FIT srclisttab='P0123456789EPX000OBSMLI0000.FIT:SRCLIST' cattab='cat2xmm.fits:SRCLIST' gifroot='m1image_'