I'd like to know if there is a consensus on how, and where, to sign limited edition photographic prints? It seems to me that there are a number of ways to go about it. Should it be signed on the actual print, if so should I plan on a white border that is visible when matted? Or sign right on the picture? What to use if signing on photo paper: pencil, felt marker, ??? Sign and number it somewhere on the mat? What have you folks with experience in this settled on? Thanks!