I was wondering if anyone has had any experience printing triptychs. I'd like to print three frames (from 3 negs.) onto the same sheet of paper, next to each other, spaced evenly. I'm shooting 6x6. Does anyone have any advice for the best way to mask and print something like that?

I was considering making a mask for the whole paper, but lining up and focusing could be a problem. Maybe just marking the paper and lining it up in the easel would be easier?

Any advice would be helpful!