User blog comment:BrianXP7/Development Blog: PetiTouch (08-20-2013)/@comment-14600979-20130820235135/@comment-50.135.48.118-20130821133158

In many original japanese PTC programs, custom sprites were defined in the code itself,  (See the music workstation)  With CHRSET not only does this make it so users only have to scan one set of QR codes,(even if your code is 9999 lines long, you can append to a sub program that defines them, still saving a lot of time for users)  It doesn't even take extra long amounts of time. I'll get to work on the calculator right after I finish my gaming quote generator.

ps. you can even define sets of colors, I had to do this to make the Touchscreen design in Obliviation.