Hello everyone. I would like to give a friend an 11x14 print of a picture I took. They've picked out one they like and have offered to pay for it. First of, I will not take their money, I'm flattered they have asked for one and so I'd like to give it to them. They have asked me to sign it, which brings me to my question. What do you all use to sign a print that will not damage the paper? Do you sign the back of the photo or down in a corner? I'm going to use a pre-cut mat to frame it and it'll pretty much cover any signature on the front. I'm just wondering how most photographers are doing it. Thanks in advance for your input and any tips.