To create your Gmail signature, please do the following:
1. Click on the Gear.
2. Click on Settings.
Once on Settings:
1. Click on the General tab and scroll to Signature.
2. On Signature, turn on to edit.
3. Add your signature. Note that you can edit your text, add a web link and a picture.
4. Check mark to have this signature added after the body of your emails.
Scroll to the bottom of the page and click on Save.