Bug 502340

SUMMARY
When using a drawing tablet with a different aspect ratio than the screen there is currently no option to keep the area on the screen maximized and "waste" area on the tablet by shrinking its mapped size and adding a deadzone

STEPS TO REPRODUCE
1. Connect a drawing tablet with different aspect ration than you display
2. Go to the tablet settings and try to configure it such that the aspect ratio is preserved, and every corner of the screen is reachable with the tablet (at the loss of some detection area on the tablet).

OBSERVED RESULT
This is only possible by manually fiddling with the mapped areas and their percentages (not even real pixel values are shown). This is imprecise and tedious (one has to determine the aspect ratio of display and tablet and then calculate the correct percentage value etc).

EXPECTED RESULT
There should be a radio option that instead of preserving the full area of the tablet and shrinking the reachable display space, instead the usable tablet space should be shrunk such that the full display is still reachable using the tablet pen.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 41
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.13.9-200.fc41.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7840U w/ Radeon  780M Graphics
Memory: 30.6 GiB of RAM
Graphics Processor: AMD Radeon 780M

ADDITIONAL INFORMATION
Extreme example: My display is 2:1 (landscape) and my tablet is 1:1 (square). The current settings allow me to preserve the aspect ratio but doing so I can only draw a rectangular region on the display (e.g. the bottom half is unreachable). What I would like instead is that I could only use a region on my tablet with aspect ration 2:1 (e.g. only the top half) but this half is then mapped to the full display allowing me to reach/draw everywhere.