This resolution limit only exists in the old spacedesk Viewer for Windows 7.
Please try the new spacedesk Viewer for Windows from the Microsoft Store.
There you should be able to define any custom resolution up to the native resolution.
Thank you for your kind reply. I really appreciate it, especially since the app is free.
Unfortunately, I’ve installed the version form the store but the viewer says “Display: Off” and it shows a black screen.
The server thinks it’s working as it extends the display but there is only a black screen on the client.
Any idea what the problem might be?
We just managed to reproduce the same problem on our side.
We will first fix it in our Windows 7 Viewer app.
It will be released on the website today or tomorrow (version 0.9.34).
Then please try out and let us know if this work for you.