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RedHat 9 (Linux i386) - man page for pnmcat (redhat section 1)

pnmcat(1)						      General Commands Manual							 pnmcat(1)

NAME
pnmcat - concatenate portable anymaps
SYNOPSIS
pnmcat [-white|-black] -leftright|-lr [-jtop|-jbottom] pnmfile pnmfile ... pnmcat [-white|-black] -topbottom|-tb [-jleft|-jright] pnmfile pnmfile ...
DESCRIPTION
Reads portable anymaps as input. Concatenates them either left to right or top to bottom, and produces a portable anymap as output.
OPTIONS
If the anymaps are not all the same height (left-right) or width (top-bottom), the smaller ones have to be justified with the largest. By default, they get centered, but you can specify one side or the other with one of the -j* flags. So, -topbottom -jleft would stack the anymaps on top of each other, flush with the left edge. The -white and -black flags specify what color to use to fill in the extra space when doing this justification. If neither is specified, the program makes a guess. All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnm(5)
AUTHOR
Copyright (C) 1989 by Jef Poskanzer. 12 March 1989 pnmcat(1)