It's not a huge pain, but is definitely something I've noticed cramps some of the custom palette sets out there. Working with that constraint isn't a dealbreaker for me. I'm chipping away at making custom palettes that use some of the characters from
https://www.nerdfonts.com/ for some "modern" art that gets displayed in a unix terminal. The unicode export and custom mirroring are killer features! I think being able to map a shape would be the logical conclusion to that! Which brings me to... where's the best place to put my donation towards the future development of this application!