I’m relatively new to OGS, but also Go in general. I love this site; it’s really helped me improve a lot these first few months!
Maybe I’m just missing it, but is there a feature to play on a “scratch board” locally? Kind of like what’s done here: https://www.playtak.com/ (If you haven’t heard of Tak, I’d recommend checking it out. It’s a recent abstract game, rich with strategy.)
This would be useful to just set up patterns to see how they look and also to play against someone else on the same computer.