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.