Email, Messaging, & Video Calls Email 154 154 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 September 11, 2020 Email Yahoo! Mail Gmail Tweet Share Email Email signatures are an easy way to sign or identify yourself automatically in an email message. It's also a great way to promote a business or product. The Mozilla Thunderbird email client makes it easy to attach an image to your signature. You can edit your Thunderbird email signature each time you compose a new message. This means you can change your signature image 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 shows up when you write a new message, delete everything in the body of the message. Build the signature to your liking (including the text that should be included). You can 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. Place the cursor on a new line and select Insert > Image to add a picture to the body. Select Choose File and choose an image from your computer. Select OK to place the image. Either enter descriptive text in the Alternate Text bar, or select Don't Use Alternate Text. Drag the handles to resize the image if needed. Select File > Save As > File. If you don't see the menu bar, press the Alt key. Before saving the image, make sure Format is set to HTML. Choose a name for the file and save it. Close 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. Go to the bottom of the Account Settings window, then select the Attach the signature from a file instead (text, HTML, or image) check box. This option disables any signature text that was included in the section above. If you want to use the text from that area, copy and 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 you saved in Step 5. Navigate to the HTML file you saved, and select Open. Close the Account Settings window. When you start a new email, the signature appears automatically.