People include many different things in their email signatures. You can use your first and last name, your first name only, your first initial and last name, or even your favorite nickname. Some people like to also include a favorite quote. Formal business signatures will typically include an employee’s full name, title, company name, address, phone number, fax number, email address, and company Web site.

1. Log on to your Gmail Account.
2. Select “Settings” in the upper right corner of the page.
3. Enter your preferred signature text in the box next to the “Signature” option (typing text into that box will automatically turn on the signature option).
4. Select “Save Changes” to confirm your signature.
5. Now every time you create new email ,  you will immediately find a signature that you created earlier.

on gmail signature option is not allowed to insert image, we can add image signature image by dragging the signature image after you generate.

first go to signature maker and create your email signature based on Gmail logo, sample like this :

open your gmail account and login, create or compose new email. and than drag the image from signature maker result box site to text editor on gmail. continue to write your email message. done! if you using outlook express you can read signature setting on outlook express