Email, Messaging, & Video Calls Email 153 153 people found this article helpful Automatically Use a Picture in a Thunderbird Signature Customize your thunderbird email signature with a photo by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on June 18, 2020 Matteo Reggiani / EyeEm / Getty Images Email Yahoo! Mail Gmail Tweet Share Email Email signatures are an easy way to sign or identify yourself automatically in any email message. It's also a great way to promote a business or product without much effort. The Mozilla Thunderbird email client makes it easy to attach an image to your signature. The good thing about email signatures is that you can edit them each time you compose a new message. This means even if you love your image signature, you can still change it or remove it for different scenarios. Add an Image to Your Mozilla Thunderbird Signature With Thunderbird open and ready to go, follow these steps: Compose a new, empty message using HTML formatting. If a signature is already showing up when you write a new message, just delete everything in the body of the message. Build the signature to your liking (including any and all text that should be included), and use the Insert > Image menu to add a picture to the body. Resize it as needed. You can even link the image to a website. Double-click the picture to open a link window or, when you insert the picture, place a URL in the Link tab of the Image Properties window before selecting OK. Select File > Save As > File... If you don't see the menu bar, press the Alt key. Before saving the image, make sure the Save as type option is set to HTML. Choose a name for the file, such as "signature.html", then select Save to store it somewhere recognizable. Close out of the new message you created; you don't have to save the draft. Select Tools > Account Settings from the menu bar. If you don't see the menu, press the Alt key. Select the email address in the left pane for any account that should use the custom email signature. On the right page, toward the bottom of the Account Settings window, check the box for the option titled Attach the signature from a file instead (text, HTML, or image). This option will immediately disable any signature text that was included in the section above. If you want to use the text from that area, be sure to copy/paste it into your signature file from above and then re-save it to the HTML file before proceeding. Select Choose... to find and select the HTML file that was saved in Step 5. Select Open to select the signature file. Select OK in the Account Settings window to save the changes.