We made our guestbook through Shutterfly using pics of us from the past year or so. My problem is how do I let out guests know that it is okay to sign the book as well. I have ultra fine sharpies for them to sign with. I had thought about making up a sign and putting it in a picture frame, but I am not sure what it should say. Does anyone have any ideas? Thanks for your help in advance, I have 11 days to go. I can't believe it is almost here.