ReaperLord22: i tried this but i cannot find any customheight in the config file at all
https://i.imgur.com/4tbN1iq.jpg but its funny i have 2k resolution there not 1080p xd
You can do what the others said, or you need to add the variable/text in yourself.
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RoboPond: I'm aware of that, several games I own will not run under 10 in a playable state. And there for are not supported. Same as a few games you can get running which also are not supported under 10, but you need third party fixes, hence why they are still classed as unsupported on 10.
Did you try running them under the base version of Win10? That's likely what Gog means by Win10 support, and I am guessing if one used that base version the games would work(for the most part...of course there might be rare exceptions).
Heck, Gog even states that on game cards....that Win10 is prone to updates and games that work now might not work later and vice versa.