I recently figured out a cool thing I can do with my iPhone. I was assembling a project to be fused together the other day in a class. The design was rather complex, silver wires on silver sheet. I was cutting and laying wires in a pattern. Then I had to take it all apart to flux the sheet so I could fuse the design. So I used my iPhone to take a camera shot. Then I used the photo as reference to reassemble the design just as I had laid it out the first time. It worked perfect. Maybe is is old hat to some but it was a discovery to me.
For what it's worth -
Carl