Emacs has many subsystems that are complicated enough that they have their own reference cards: Dired, Org Mode, and Calc are prime examples but there are others. If I find myself using a refcard frequently, I bookmark in my browser and maybe in Emacs’ bookmarks so it’s easy to find. I recently saw a tweet with another idea:
One related tip for #Emacs folks: Tons of refcards are already on your machine. Locate them with:
M-x locate <RET> refcard <RET>I use the Dired refcard very often. https://t.co/9q8LVAN1cu pic.twitter.com/0YX1oXw74h
— Vedang Manerikar (@vedang) February 21, 2020
That never occurred to me probably because the locate database isn’t built by default on MacOS and I’ve never bothered to build it. The Mac does have Spotlight, though, which includes locate’s functionality so I invoked it and typed in “refcards.” Just as Manerikar said, I got a list of every refcard on my system. When I clicked on dired-ref.pdf it opened a Preview window with Dired’s refcard. That’s really handy. I may even build the locate database just to try it out there.