For starters, signature is text written at the end of each email you send. Till now, we could only use simple text as Gmail signature. Now you can spice up signature on emails sent through Gmail account using new rich text signature feature. It allows you to add any image, hyperlink to website address, stylize text and much more.
Images & rich text formatted Gmail signature
1. Goto Gmail.com and login into your account.
2. Click on “Settings” option at the top.
3. Under “General” tab look for ‘Signature’ option.
4. Click to select rich formatting editor. Then type any signature text and use options on the toolbar to stylize text, add hyperlink, add signature image, position text and lots more.
Please note, image displayed in Gmail signature must be uploaded somewhere. You can use tinypic.com website to upload and display signature image on outgoing emails on Gmail. You can also add customized jazzy email signature using WiseStamp Firefox extension. [via Gmail blog]