This command shows a brief summary of the header information for the images
contained in the buffers. If specific buffers are listed, the program
lists information for only those buffers. Otherwise, all buffers with
images in them are listed. If the keyword FULL is specified, a longer
listing is given for each buffer. If the keyword FITS=param is given then
the literal text of the FITS header is printed for the FITS header
parameter 'param'. If you use just the keyword FITS (no specified
parameter) AND you use the FULL keyword then all of the FITS header
parameters will be shown.
Examples: