To manage your signatures, go to Preferences > Signatures:
The Mailspring signature editor makes it easy to create signatures to use in your emails. Here's a quick breakdown of the options available from Preferences > Signatures:
The left sidebar shows the signatures that you've created. Click one to edit it, or click the "-" icon beneath the panel to remove the selected signature. To create / duplicate one of your existing signatures, click "+".
Make Signatures the Default
In the top right corner of the signature editor, a dropdown allows you to make the selected signature the default for one or more accounts. When a signature is the default, it is automatically used when you compose new messages or replies from that account.
Use Templates or RAW HTML
Beneath the signature preview box, you'll find a horizontal list of available signature templates. Templates make it easy to create a beautiful signature. Once you've selected a template, you can use the "Information" section beneath the template list to enter contact information you'd like displayed.
If you have a signature you've created elsewhere and want to use in Mailspring, or want to edit your signature as HTML, scroll all the way to the right and choose "Raw HTML"
Add an Image
To add an image to your signature, choose a template and scroll to the bottom of the "information" section. You can choose to use an existing image that is available online, like your Gravatar Profile Photo or Company Logo, or upload a custom image or URL:
To choose a URL: Select "Custom Image" from the dropdown - an input appears and you can paste in your URL.
To choose an image on your computer: Click the picture placeholder box, or drag-and-drop a file from your computer on to the box. The image will be resampled for your signature and uploaded so it can be viewed by everyone who receives your emails.
Use your Brand Color
To theme a signature template and make your signature match your brand, enter a "hex color" or color name into the "Theme Color" box under "Information":
The theme color is applied to certain parts of your signature to give it a beautiful on-brand look: