How do I sign a PDF file then email it back?

Once you have an MSB Docs account, signing a document is easy. When you sign, the executed copy will be sent to all added parties as well as yourself. If a document is received in your email without being uploaded to MSB Docs first, the My Signatures tool allows you to add eSignature without ever leaving your inbox. All you have to do is install the same add-on for Gmail and then send it back via email.