Hello,
I use a Dell U2720Q 27" 4K monitor. In Windows 10, I set display resolution at 3840x2160 and zoom level at 200%.
Previously I used a GTX 960 video card and I could play 0 AD without any change to 0 AD's video settings.
But recently I upgraded to GTX 1060 and in 0 AD's full screen mode when I put my mouse at the right edge of the screen, the game view wouldn't move right. I had to move the mouse 1 pixel leftward for the view to move right. Putting the mouse at the left, top, bottom edges of the screen doesn't have this problem.
My current workaround is:
In %appdata%\0ad\config\local.cfg, add this line: gui.scale = "2"
Find pyrogenesis.exe in Windows Explorer, right-click it and choose "Properties" -> Compatibility-> High-DPI settings -> enable "overwrite high DPI scaling".
Then 0 AD (the latest version) will work perfectly in full screen mode like before.
Hope this issue gets fixed soon.