I have read the A3XXX overview of the new live instruments (which I love and cant wait to get them on the larger aircrafts) but I have been flying the A321 and A320 and I dont see anything happen differently on any of the displays when i switch between GPS/NAV1. In the XCub there would be changes on the displays but I dont see anything happen when I do it in these aircrafts. I have tried it on multiple points in the flight (pre-takeoff, takeoff, inflight, on approach, etc).
Also just to confirm (as I didnt see this discussed) when the menu says Source GPS does that mean its on GPS or does that mean its on NAV and I need to click the button (so that it shows source NAV1) so that it would be on GPS. Idk if what was displayed in the menu indicated what was active or if the active part was the one not displayed