If you need to add a signature to a Word document, this is the easiest way to do it. I’ll show you how to sign on paper, take a quick photo with your phone, and insert it into Word. From there ...

Select “ Add Signature,” then sign with your finger. Tap “ Done” and move the signature where it needs to go. When you're finished, tap the “ Share” icon to send the signed document.

If the Signature Line option is greyed out in Excel or Word on your desktop, remove editing restrictions or add a signature line manually.