Not sure if it works on all desk top environments but try pressing alt +f8 then use the arrow keys to resize a window. Until you press return, the cursor will lock to which ever side you move it using the arrow keys and you can also use the mouse to drag it.
Hello Lugs,
Xmas present to self was a PinebookPro
<https://www.pine64.org/pinebook-pro/> Mostly I'm pleased with it but
found two problems with no solutions on Pine forums (perils of being an
early adopter).
1. This is an issue on my Mint Desktop too, and my wife's KDE Neon. Is
there a way to make window borders wider? Or if not visually larger then
make the target area bigger? When trying to manually resize a window I
find it very hard with mouse or trackpad to hit the edge/corner to click
and drag. Slim borders look great but don't work well (for me).