I’m discovering the split screen and tabs functions and I think they work fantastic, I’ve always been missing something like this in my previous notation software. One thing I haven’t been able to figure out is whether it’s possible to view two different projects in one split screen (which was about the only thing my previous software actually did manage). I do a lot of arrangements and I like to have the original and the arrangement next to each other for easy copy/pasting. I use an external display whenever possible so I can just put the two projects on their own screen, but I also work a lot from my laptop only. Using the Windows split screen option doesn’t work because it’s not possible to fit the Dorico window on half my screen, even when closing the side panels.
Related but not related: I’ve also been thinking about using Flows for arrangements, so entering the original in flow 1 and creating the arrangement in flow 2. However I don’t know whether that might create issues for larger works and it will get messy when you’re arranging a piece that has multiple movements.