How to Put a Signature on Microsoft Excel. Microsoft's Office programs have powerful options for creating and editing documents as well as protecting those documents.

First things first, to create a digital signature, you must have a signing certificate, which proves identity and verifies the authenticity of the document. So, when you send a digitally signed file ...

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

How to add a graphic watermark to a spreadsheet in Excel Your email has been sent You may already know you can add a watermark to a Word document, but you might not know that you can also add a ...