Pbm

Syntax:

        set terminal pbm {<fontsize>}
        set terminal pgm {<fontsize>}
        set terminal ppm {<fontsize>}

where <fontsize> is small, medium, or large. Default size is 640 pixels wide and 480 pixels high. The pbm output is a portable bitmap (one bit per pixel). The pgm output is a portable graymap (three bits per pixel). The ppm output is a portable pixmap (color, four bits per pixel). The output of these drivers can be used with Jef Poskanzer's excellent PBMPLUS package which provides programs to convert the above PBMPLUS formats to GIF, TIFF, MacPaint, Macintosh PICT, PCX, X11 bitmap and many others.

Examples:

        set term pbm small
        set size 2,2
        set term ppm medium