Apps that natively support fractional scaling will not be scaled by the compositor. (Well unless they span multiple monitors with different scales IIUC.) Scalin

Apps that natively support fractional scaling will not be scaled by the compositor. (Well unless they span multiple monitors with different scales IIUC.) Scaling is just a fallback for apps that don't support fractional scaling or edge cases like you drag a non-responding app onto a monitor with a different scale. Yes, you can have a per-monitor scale factor and apps should render at the right scale based on where they are positioned.