GREMLIN is an interactive graphics editor for UNIX systems. It permits various objects to be drawn and edited, including circles, rectangles, lines, curves, and polygons. Objects may be modified by moving, copying, resizing, or changing line and stipple styles. Text may be included in the picture in several sizes and fonts. GREMLIN pictures may be saved on disk for later editing, or included in typeset documents for printing. Versions of GREMLIN exist for the SUN workstation and the AED graphics terminal. This tutorial describes the version for the SUN running under the suntools environment.