> Has anyone thought that through? Your arms would get tired so fast. This has been known since 1963. Not kidding: https://en.wikipedia.org/wiki/Sketchpad ht

> Has anyone thought that through? Your arms would get tired so fast. This has been known since 1963. Not kidding: https://en.wikipedia.org/wiki/Sketchpad https://en.wikipedia.org/wiki/Sketchpad That was the first complete light-pen system that could be used by a non-programmer. Sutherland immediately declared the light pen was a stupid idea because all the blood drains out of your hand.