If you're not satisfied, click Clear, and write a new signature and repeat the process. If you're satisfied with the signature, click Done. The camera will pick up the signature and create a digital version. Hold up your signature so that it hovers over the blue line. The easier (and default option) is to sign on a piece of paper, and hold that piece of paper up to your Mac's camera. There are two ways to save your signature. Go to Tools > Annotate > Signature > Manage Signatures.
Mac users don't have to sign up for any additional services or download any additional software to easily sign documents in seconds-all you need is the native Mac app, Preview. Not to be confused with digital signatures which use encryption, electronic signatures are an easy way to add your signature to any documents in PDF format.
In this digital age, signing documents is increasingly becoming something that you can do online without having to print out a single page.