Here are some recommended steps to add a signature to your email responses:

1. Type out the signature you would like to use
2. Open the preferences tab of your email service
3. Look for the option that allows you to add a signature or a post script
4. Copy and paste your signature text into the signature window
5. Adjust the settings to make sure the signature is added automatically to all emails you send out
6. Save the settings and start sending emails with your signature.