i'm working with proxy,

my project setting is 1920/818 (aspect ratio 1/1) / 10bits / lanzcos

how can i downscale the playback resolution to edit it without any stop/play ?

i mean with the red files, we can do it, but with apple pro res can we do it ?

may i configure, the buffer and the number of picture in the buffer in my project setting ? (mine is 256 mo, 10 pics)