def prtOptions():
    """Print a list of command-line options and arguments."""
    print('The command-line arguments and options are:')
    print('  -q (quiet)')
    print('  -v (very verbose)')
    print('  -u (update keywords in input corrtag files)')
    print('  -o outdir (output directory name)')
    print('  --find yes (find Y location of spectrum)')
    print('  --find no (use Y location of spectrum from 1dx file and wavecal)')
    print('  --find cutoff (find Y location if sigma <= cutoff)')
    print('  --location Y location(s) at which to extract spectra')
    print('  --extrsize height(s) of extraction region(s)')
    print('  one or more corrtag file names')
