GW-Basic on DOS did the exact same thing in graphics mode. I had quite a bit of fun experimenting with that. Also, Bill Atkinson, when making MacPaint, actuall

GW-Basic on DOS did the exact same thing in graphics mode. I had quite a bit of fun experimenting with that. Also, Bill Atkinson, when making MacPaint, actually implemented something similar to edit text that had been placed into the bitmap with the text tool. Since he knew that it couldn't be perfectly reliable (as there might be non-text pixels in there), he got rid of the feature (https://www.folklore.org/StoryView.py?project=Macintosh&story=MacPaint_Evolution.txt https://www.folklore.org/StoryView.py?project=Macintosh&stor...)