To display an image, once SAOimage or Imtool is running:
cfa#: cl # Initiate IRAF from within one of the windows
cl> images # Load the relevant package
im> xray # Necessary if demonstration file used.
# Not necessary if you use file in current directory
xr> tv
tv> display xdata$snr # will display central 512x512 of
# a 1024x1024 Einstein image.
frame to be written into (1:4)(1): 1 # Although IRAF recognizes 4
# buffers, SAO image only has one.