Where to find your signatures depends on which Outlook you use:
- Outlook app on Windows: File, then Options, then Mail, then Signatures.
- New Outlook for Windows: Settings, then Accounts, then Signatures.
- Outlook app on Mac: the Outlook menu at the top of your screen, then Settings, then Signatures.
- Outlook in a web browser (outlook.com or Microsoft 365): Settings, then Accounts, then Signatures. On some older versions it is under Mail, then Compose and reply.
Add a new signature, paste yours into the box, and save.
In the Outlook app on Windows your photo shows still instead of moving, for you and for anyone reading your emails there. That is normal and nothing is broken.