-parser.add_argument("-c", "--crop_range", action="append", help="crops left, bottom, right, top – e.g., '10,10,10,10'; prefix with ':'-delimited page range to limit effect")
-parser.add_argument("-n", "--nup4", action='store_true', help="puts 4 input pages onto 1 output page")
-parser.add_argument("-a", "--analyze", action="store_true", help="print lines identifying spine, page borders")
-parser.add_argument("-t", "--symmetry", action="store_true", help="alternate horizontal crops between odd and even pages")
+parser.add_argument("-c", "--crop_range", action="append", help="cm crops left, bottom, right, top – e.g., '10,10,10,10'; prefix with ':'-delimited page range to limit effect")
+parser.add_argument("-s", "--symmetry", action="store_true", help="alternate horizontal crops between odd and even pages")