This program is part of Netpbm. pbmtoxbm reads a PBM image as input and produces an X10 or X11 bitmap as output.
You may not specify this with -x11.
This option was new with Netpbm 10.37 (December 2006). Before that, use pbmtox10bm instead.
You may not specify this with -x10.
The X11 version is the default, so this option has no effect.
This option was new with Netpbm 10.37 (December 2006).