I was confused for a while too, just got an analog rytm mkii a few months ago. its not as confusing as the manual makes it seem.

press and hold [perf] for a second or two. this will allow you to enter new ‘locked’ parameters and those ‘locked’ values will be effected by pad velocity or [qperf] knob. when you are editing the ‘locked’ parameters, the values will be highlighted in white with a plus or minus before them, indicating these are relative values to what you have entered outside of performance mode. to switch any performance pad to the qperf knob, just hit qperf and then a pad, now the knob will affect those values instead of velocity of the pad. just play around with it and you figure it out. don’t get overwhelmed, just choose one feature to learn each time you sit down with it and before long you’ll be an expert.