Change resolution of the rendered view ? how the rendered view work ? we can change the preview sample , the preview bounce , the preview subdivision , the preview texture size , but can we change the render view resolution?

i have this feeling its stuck on the native resolution of the display which is really bad if you want to have a quick real timme preview (5k screen here)

if its not possible ill do a topic on right click select
Itds "pixel size" option in propreties render tab , and its coming to 2.8