Open the Excel document needing a signature if it's not open already. Then open the "Sign" dialog box by either double-clicking the signature line or by right-clicking it and selecting "Sign." Add ...

Learn how to create, add or remove the digital signatures in the Microsoft Excel files. You will first need to have a signing certificate.

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 digital signature to your documents No need to print a document, sign it and scan again. Use these tools and websites to add your digital signatures in a few simple steps.