Thanks for your answer Mike,
As I was describing, I am mirroring the image from a cell to an external monitor, so the final resolution is the one from the phone...
Again, it is a
LG V30 ThinQ running Android 8.0.0, but I think is not a true bare Android, and it might use a modified version of it (like Samsung does), as opposed to my newer
LG G7 One that uses a real Android 9 version...
Anyways, that setting I am refering to is named
App scaling, and is application specific... not all of my installed apps are available for that setting, but another setting called
Display size is.
Also, on my newer LG that setting is not present, only the
Font size and
Display size as a general setting for every applications are present, and that Display size setting is not enough to make a satisfying difference!
The problem I encounter when mirroring is that the whole size of everything is exactly like on the phone itself, resulting in huge pop-up windows and menus on the external 22'' monitor...
That's why I was looking to increase the application resolution, to make everything smaller in fact.
The music itself, so the PDF, is perfect...
Error message is: MobileSheets Pro does not support the current Display size setting and may behave unexpectedly.
I might not adopt that method anyways, because there is no way to hook the USB-A connector of the touchscreen monitor to the only USB-C connector of the phone (or eventually tablet), on top of the HDMI (or DisplayPort)... I also thought of casting from a Goggle dongle (or Miracast), but again the problem is to rely on a WiFi network AND no way to preserve the touchscreen function of the monitor.
I am almost convinced to buy ELO Touch I-Series 2.0 for Android 22''
https://docs.elotouch.com/ELO_I-Series-A...10_web.pdf
but I wonder if they are going to release a newer model soon...