in the layers panel, I would love to see sliders to control the opacity settings. It would make the work flow progress more quickly.

Also, the ability to change the opacity of the desktop canvas so that you can see an image on a desktop. For example, if I already have an image open in Preview on a mac then I just lower the opacity on the main canvas with a slider to get a quick glimpse of it while I am working without having to use AR resources. It would be a quick and handy feature.