wrong scale on HiDPI screen with Wayland
The 100% scale does not correspond to the true metric size on HiDPI screen with a scale different than 1. E.g. on a scale 2 HiDPI screen a 100% scale in evince will show the document at 2x the metric size, while 50% will show the document at the correct metric size on the screen.
This seems only be an issue with Wayland, where buffers are scaled automatically. Evince should account for that.