You can use the minimum unique abbreviation of the options. You can
use two hyphens instead of one. You can separate an option name from
its value with white space instead of an equals sign.
This program is part of Netpbm.
pnmindex creates an index image containing thumbnail (small) versions
of a bunch of PNM files you supply. (Akin to a photographic 'contact
pnmindex labels each thumbnail and, optionally, contains a title.
If you just want to concatenate some images together in a grid, use
pamundice for that.
If you want to take apart the image you generated with pnmindex, use
pamdice or pamcut.
-black This controls the color of the padding between the images; nor-
-quant Enables quanization (to the number of colors specified by -col-
pamscale, pnmcat, pbmtext, pnmquant, pamcut,
pamdice, pamundice, pnmtile, pnm
Copyright (C) 1991 by Jef Poskanzer.
-title and -noquant added 2000 by John Heidemann.
netpbm documentation 1 April 2007 Pnmindex User Manual(0)