File talk:Screen shot of an edit session in Xerox Ventura Publisher, ca. 1990.jpg

The equation editing feature was found in the Xerox Ventura Publisher Professional Extension pack. It might be worth mentioning this in the description of this picture. Source: Xerox Ventura Publisher Professional Extension Reference Guide - Part No. 610E18480 --GreyBeardZA (talk) 19:58, 1 October 2016 (UTC)