[User Interface improvements desired]

Thanks for the prompt reply MEB. Unfortunately it mostly reminded me how unimpressed I was when I made that switch. Part of it is inherent with light on dark text--I have similar issues with Capture One. But it is also font size. A large monitor wants an increased viewing distance. Online, I've set my browser at 150% text size, up from 120%. Similar flexibility seems reasonable in a photo editor that I will use for many more hours at a time.

[User Interface improvements desired]

I agree completely. The eye strain is particularly a problem on my 27", wide gamut, optimized for photo editing monitor. Not really a problem on a 13" retina display, but a serious photography tool needs to work well with other serious photography tools.

[Is there a way to view a mask via a rubylith]

Thanks, this helps me a lot. I prefer the greyscale representation to a red overlay. You can also right click on a mask icon and choose edit adjustment to get a grayscale representation, but it doesn't work for adjustment and filter layers, only masks. I'm a little surprised that there's no toggle available--apparently you have to click on another layer and then the layer you're working on to get back to the image.

[Printer profile.]

OS X seems to store them in Library->ColorSync->Profiles and some programs look there automatically, eg. Preview. To tell Affinity where to look, go to File->Import ICC Profile... and navigate to wherever you decide to store profiles.

[Help with colour profiles]

I'm don't have much to offer about screen image quality of jpgs as I've only used AP to make prints. I've found the results entirely acceptable, and expect even better once I learn it well enough. You can assign profiles while using the develop persona under the basic tab: view-->studio-->basic. Tic the bottom checkbox and it gives you the choice of any profile installed on your computer.