Yes, I’m doing the split screen trick also, on Gnome 3, but it’ can get a bit confusing, because I have too many img shortcodes on my text editor
Anyway I manage as things are. And I’ll try my plan with the markdown editor Pen and come back and share it with the community, if I get a working solution.
But also I would like to mention once again the great HugoPhotoswipe tool by Gertjan van den Burg https://github.com/GjjvdBurg/HugoPhotoSwipe
It’s easy to customize. And it’s the best tool I’ve found to deal with a lot of images in Hugo.