I made small square images out of all the control description symbols; friends and I stored them on our phones (and cloud storage) and will occasionally text an image to each other so the other person can text back the meaning. (when we first did it before ranking event[s] we went through all of them heavily, but it can continue anytime/anywhere as a touchup/refresh.)
Anyone interested can access in my GD:
https://bit.ly/3WiXN45There's also a Word file in there that is basically the IOF tables jammed together so they all fit front/back of a single sheet landscape. I have a printed copy in a mapcase in my kit for anytime/pre-event refresh.