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.

You can add a strikethrough in Microsoft Excel using the software's Font Settings button or a keyboard shortcut.

You can add a column in Excel by right-clicking or using the “Insert” option. These features are helpful for adding new data to a spreadsheet.

Signatures validate a document by showing that you manually endorsed it with your written or digital signature. Microsoft Word 2013 won't automatically add your signature to all documents, because ...