To do this, open your Excel document. Then, under the File tab, look for Info, Protect Workbook, and click on Add a Digital Signature. Then, complete the fields and click on Sign. Once the document has been signed, you can see any signatures under a new tab called Signatures at the bottom of your page.

Open the Excel document. Click on the ‘Insert’ tab. Select ‘Pictures’ and choose your signature file. Resize and position the signature on the sheet.

If you're not already in an Office file or document, open an app such as Word or Excel, and open an existing file, or create a new one. Select File > Account (or Office Account if you're using Outlook). If you're not already signed in, click Sign In. In the Sign in window, type the email address and password you use with Office.

To insert one, follow these steps: First, in the Ribbon, go to Insert tab > Signature Line (from the Text group). The Signature Setup window appears. In the Suggested signer box, put the name to be signed. You can also add the signer’s title and/or email address.