I'm still adapting to the new way Blender handles grease pencil in 2.8.
I've used the grease pencil to sketch a front and profile view of a character I'm working on. I'd like to duplicate this sketch and rotate one of the sketch layers 90 degrees so that I can view it in both front and side viewports. However, none of the old UI for manipulating layers seems to still be there. Is there a way to do this?