Editing Tgif (program) (section)

== The Tgif file format ==
Tgif saves drawings in a [[Prolog]]-based<ref>Tgif FAQ - Tgif File Format, http://bourbon.usc.edu/tgif/faq/format.html</ref> [[plain text]] file format. Because the program is based on Prolog,{{citation needed|date=April 2012}} there isn't a lot of support from other programs for reading the Tgif file format.

Fonts are represented as [[PostScript]] font names. Originally, it was possible to print Tgif drawings in [[batch mode]] without using an [[X11|X display]]. However, this feature changed somewhere in the 4.1 versions. Currently, in order to print drawings, the user would need to be running Tgif on an X display. This restriction cannot be applied if the drawing only uses [[Times Roman]], [[Helvetica]], [[Courier (typeface)|Courier]], and/or [[Symbol (typeface)|Symbol]] fonts.