In order to display images TeXmacs relies on the Ghostscript program. This program makes it possible
to display postscripts graphics in X Window applications. Other
programs like tiff2ps, pnmtops, giftopnm,
etc. are used to convert other image formats into postscript.
The Ghostview program is a popular
postscript file viewer based on Ghostscript. It
may be used in combination with TeXmacs for previewing documents
before you print them.