There is still the issue of the size jumping if you are trying to resize the largest size mix.

My scenario is that we are using a Spyder to spread a single output of a 1900xt at 1920 x 1600 over 2 projectors. Ideally I want the mix to be 1920 x 612 pixels. If I size the mix to 1920 x 1080 as per the menu in Mix options it goes to that size no problem. But if I want to drag the corner up to get my 612 size the width snaps to 1710 pixels.

I can get around this with cropping and positioning on the Spyder but I would really like to have it on the Catalyst so I can preview the image at the source and see that my sizing is all correct and that my custom artwork looks as it should.

Cheers

Toby