I am using 4.10m119. I am mixing layer 1+2 to mix 6 on layer 3. I have noticed that the size of the mix window in dependant on what size file I have loaed below. Though if i try to use layer 3 on layer 5 it finds the file listed on layer 3 and not the mix effect. Just something I noticed that I was wondering about.

Pic attached below

Ryan

http://www.dayoneprod.com/submixuselayer.tiff