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

Add your signature. To do this, type your name beside the "X" to add a text signature. Alternatively, click "Select Image" to browse to an image version of your printed signature.

Open an Excel workbook and select a sheet where you want to add a digital signature. In the Insert menu, select the Signature Line option, and a Signature Setup box will pop up.