I have a PDF document that a work colleague needs to add their signature to. The thing is, they need it placed on there today, and they are not in the office, so they cannot physically sign it with my stylus (I have the only one in the office). I do, however, have a PSD document of her signature. So my question is, how do I add her signature, like a layer, on to the PDF document (preferably from within Acrobat)? Seems simple, but I can't figure it out for the life of me. Thanks in advance.