To create a signature under Opera Mail, follow the below procedure:
- Open Opera Mail.
- Click Compose button
- In the Compose Message window, click on the small Settings button (small wrench icon) > Edit Signature.
The signature editor shall open, you can either choose to create a signature using HTML formatting or as Plain Text
- Click on the Insert button, to add hyperlinks, images or line breaks to your signature.
- Check "Apply current signature for all acounts" and Save.