Hi Coop,
thanks a lot for your fast reply. I will try it again with the Pump switch.
I know that there is a floating VR window of Avitab but i like the integrated one, it is faster to open and looks way better. I only have noticed, that if i don‘t point exactly on the soft buttons, e.G. of navigraph charts, one has accidentally clicked on the green boarder and iPad is closed. So for me a locking function would be great.