The task may be simple, but in practice, it’s not always effortless or convenient. Just open the file, print it out, sign it, scan it, attach it to an email, and send it off. Signing a document and returning it in an email sounds easy enough. Has someone ever sent you an email and asked you to sign an attached PDF document? Perhaps it was a contract for that project you just secured, an offer letter for a new job that you landed, or a rental agreement for that sweet place in the perfect neighborhood. You can move and resize the signature to suit your needs.Once you’ve inserted your signature, select “Done”.If you don’t have a signature created already, select “Create Signature”.If you’ve created your signature already, select it and insert it into the PDF.Open the PDF in Mac’s free “Preview” program and select the signature icon.How to add a signature to a PDF on Mac Preview