When you send proposals to your clients through Better Proposals, they will receive an email from you with a link to their proposal. You can customise this email to include your personal branding, including your logo and email signature.
To change your email signature, just hover over your profile picture in top right corner of your Dashboard and click 'Settings' in the drop down menu.
From there, you can find 'Email Signature' option under the 'Profile' section in the menu on the left.
There are two tabs on this page, so you can choose to paste in either a plain text signature, or switch to the HTML tab and paste in your HTML signature.
Click 'Save Changes' and a preview of your signature will appear below.