Leap 43.2 KDE problem with resolutionon dell xps 13.3 inch QHD+ (3200 x 1800) and dual monitor

I installed opensuse Leap 42.3 on dell xps 13.3 inch QHD+ (3200 x 1800) and I have the big problem with resolution.
The same problem is with the second monitor.
Any tips how to correct this?

Do you mind, telling us, what “the big problem” is?
So I can only guess, that all letters in headlines, menus, etc. are way too small.
If so, open the KDE settings, the fonts settings. There you find a box, where you can enforce the DPI value.
Try to set this to the correct value for your resolution and screen size.


The problem is with the resolution it means that the letter and icons on my laptop desktop are way too small.

I have temporarily solved this problem by changing the scale to 2 (in Display Settings) and changing the DPI value to 192 (in font settings).

But still, some other applications require manual changing in font size etc.

But now I have a similar problem with the second monitor (dual monitor settings), also the resolution is wrong, but on the second monitor the icons and letter a too big.

Maybe somebody knows how to change the scale or DPI for the second monitor?

My laptop monitor is 3200x1800 (but I change the scale to 2) and my second monitor is 1920x1080.