Bravo was the first WYSIWYG editor (…) Previous editors rarely made any attempt to match the display to the printed page; this meant that users could not check whether they had formatted the document correctly, except by printing it out.¹

The Xerox Alto (1973) for which the Bravo text editor was developed. Photo: Martin Pittenauerm, Creative Commons Attribution-Share Alike 2.5 Generic license.

1. Newman, W. (2012). Design case study: The Bravo text editor. Interactions, 19(1), 75-80