Hi,

I'm working on a roof detail of a pitched roof. I'd like to split the detail and bring the edges closer together. When I split the crop region I can only do it horizontally or vertically, not perpendicular to the roof as I'd like, and I can only move the separated regions horizontally or vertically (depending on how they were split) so I can't keep the two pieces of the roof detail aligned. Does anyone have a trick for splitting a detail of something angled and keeping it aligned?

Thanks in advance for the help.