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Looking for a cheat sheet for report letter meaning

I have a few operators here that can't understand the reports and I am going to make a cheat sheet to explain what the letters on the reports mean. X,Y,Z the LF(length feature), M and so on. I haven't looked back through my training manuals yet but I do have them if anyone recalls it being in there.
I was wondering if anyone all ready has one or if they know where to find one?
Thanks