Hello Richard ,
Greetings for the day!
Hope you are using Outlook 2021 or Office 365 and I'm glad to provide information about changing the signature.
- Click File > Options > Mail > Signatures.
- Click the signature you want to edit, and then make your changes in the Edit signature box.
- When you're done, select Save > OK.
Please refer the details here - https://support.microsoft.com/office/86597769-e4df-4320-b219-39d6e1a9e87b https://support.microsoft.com/office/b709384a-36a6-488a-b19f-0c49f9957209
Hope this information helps. Please feel free to get back if you have any questions. Thank you! Ravikumar Help the next person who has this issue by indicating if this reply solved your problem. Click Yes or No below.