I have everything set to 100% scaling because that's a low as you can put it. The defaults had my laptop at 250% (!!!) and external monitor at 150%, which makes the laptop in particular look like some cramped 800x600 monitor out of 1995. In theory I'd like to have my external display be at something like 75% because it's so much larger than the laptop, but I've never seen any OS support this. Does wayland let you do fractional scales like this?
Edit: I also just tried plugging my 4k monitor into my Linux laptop (with a 1920x1080 screen), and it at least defaults both to 100%, which is more sane than "modern" windows. Again I'd probably prefer 75% scaling on the 1080 monitor because things are otherwise too big.
When I had my previous laptop, it had 100% for 4k@16" in Linux by default, and it was causing me a pain in the eyes. Switched to 200% back then, because fractional scaling in Ubuntu wasn't working well.
I'm not sure if it's possible to have scaling less than 100%, I just never thought to make things smaller, not bigger.
I don't understand the point of a high resolution monitor that you scale up. Just to have extremely crisp lines? To me the whole point of a high resolution is that you can have more information on the screen because it remains legible when small.
> Most people probably don't even know scaling options exist, so using different ones on different monitors is going to be niche, yeah.
If you don't know the thing exists, that doesn't mean you don't use it. Modern OSes adjust scaling automatically for the screen DPI. Otherwise using configs like Retina MacBook + 1440p displays, or 4k laptop + 4k external display would be very painful.