hmm yes i realised that.. but sure it must be useful for something, but what... i mean if it was useless why would it be put here. i once thought that settign it will adapt proportionaly the initial display windows (and so the future render) into "printable" dimensions you aimed maybe... but it is not. I thought it would be somethign regarding quality of the picture, as long as you want to enlarge it or not, but such thing also mostly depend on compression algorythm of save file format.. i am puzzled :(