Thank'sThere is no way currently. The parameter box that appears is the value of that soft knob and the lights on the physical knob is the position you'd see on the soft knob.
You could also turn the A-E below the screen to turn the soft knob.
My best suggestion is use the A-E knobs if you are already on the Amp Edit page. If you aren't on that page, the box is designed to show for 3 seconds and then disappear.Thank's
Ok ! Yes I know
But it stays for half a minut and slows down the workflow. I hope they change the size or active time for it in next firmware.