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.

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.

To add hyperlinks to Excel, you can type the corresponding URL, add hyperlinks using the Link feature or use the HYPERLINK Function.

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