None of the existing display configuration tools does what I think is "the right thing". So I went and wrote one.

• Don't start from a stored config, use xrandr to read the systems' current state
• Allow creating "profiles" that will get applied smartly (not there yet)
• Generate a xrandr invocation to reflect the desired configuration
• Allow per-monitor scaling
• Allow arbitrary monitor positioning
• Implement "scale everything so all the pixels are the same size"

If you have PySide2: python -m xrandroll in the folder where you cloned it (of course deps are a problem, this is experimental code, if you can't figure it out it's probably better for you 😊).

• Implement other things
• Forget about it forever