1. Open gmail.com and click on the gear icon in the upper right hand corner. 

 

2. Click "See all settings" 

 

 

3. In the first Tab "General" scroll down to the signature section.

  

 

4. Click "Create New" and name your signature.

 

 

5. Type your signature or Copy and Paste a template in the text box:

 

 

 

 

 

6. Under Signature defaults select your signature name.

 

 

7. Click "Save changes" below.