The Graphon GO-235 is a terminal compatible with a VT100/VT200 and Tektronix 4014. It permits both text and graphics on the same screen in separate planes when properly configured. This configuration is assumed by the LONGLIB graphics library. The Graphon terminal supports linetypes, graphics input, and XOR plot mode. A command file GCLEAR (executed from DCL) is provided to clear the screen and reset to text mode.