Here a scanned copy I found from matrixsynths. Going to be hard to memorize this. Might have to make a cheat sheet.
I had found that too, but it’s hard to make sense of it… And some of it isn’t updated. For example, on the OB-X8, the OSC2 Freq. knob controls Tri.Xmod in Page 2 mode, but that’s not on the old legend.
So, it would be helpful to have a new, up-to-date version as part of the manual ;-)