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.

This screenshot guide shows you hwot to create, customize and insert a watermark in Microsoft Excel using two different methods.

You may already know you can add a watermark to a Word document, but you might not know that you can also add a watermark to an Excel sheet. Here's how.

Add a layer of security with a signature line in any Word, Excel and PowerPoint document, or record your own digital signature in a document that includes a signature line.