For those who want to turn off the auto triggering level in AUTO trig mode the setting is buried away in the system menu of all places. They should have put it in the trigger menu
You only need to turn it off once.
Over in the other thread it's been noted that if you use a x1 probe then pretty much all the problems disappear due to the extra capacitance. You're limited to about 30MHz, sure, but all the artifacts disappear.
I think it would be cool to find the optimum capacitance to maximize bandwidth, solder a capacitor of that size into the front end, go back to using x10 probes.
This simple mod would mean you can rely a lot more on what's being shown on screen being correct. Anybody up for doing it? (I don't have one of these yet, so...)
Maybe there's a 'hacking the Fnirsi Tablet Oscilloscope" video in this for Dave.