@jtr The cables are these: https://www.amazon.com/gp/product/B014PD30NQ?th=1. I just hang the cable from a pushpin stuck in the wall :). It comes with a handful of strong magnets
Most of the prints I hang are darkroom prints, yes, but with the new printer this is changing. I like a prominent margin. Give photos room to breath in the print. I change sizes often, though, just to see how they look. I dislike borderless prints.
I use Capture One for editing, sometimes Lightroom Classic.