Regarding the keyboard, I use something like this https://unix.stackexchange.com/questions/547705/finding-apl-symbols-on-the-keyboard https://unix.stackexchange

Regarding the keyboard, I use something like this https://unix.stackexchange.com/questions/547705/finding-apl-symbols-on-the-keyboard https://unix.stackexchange.com/questions/547705/finding-apl-... and well, a picture of the mappings, but somehow they kind of end sticking in your head...