To get started with customizing your Email Signature in Base, you'll first want to make sure that you've connected your email account to Base. If you haven't done so, check out this guide.
Once your email is connected, head back to your email settings page.
The email signature editor provides four text formatting options: bold text, italics text, underline text, and bulleted list text.
To hyperlink text in your signature, simply select the text you would like to link.
Select the hyperlink icon, insert your URL into the Paste link URL field and click Insert.
Adding an image
All you need to add an image to your signature is a direct link to a publicly hosted image. When you find your image online, most websites allow you to right-click and select "open image in new tab". Once you've opened the image in a new tab, copy the URL in your web browser's address bar.
Once in your email settings, place your mouse cursor in the signature body where you'd like the image to appear.
Click the image icon, insert your URL in the Paste image URL field and click Insert.
Remember to click Save when you're finished customizing!