To be able to use your logo, you must have it hosted online. In this example, I will be using the Clear Books logo which is hosted on our website within the Media Centre page.
Head to Contacts > Emails and click on the Signature tab.
Click on the place on the template you would like the image to appear and hit the insert image icon.
Enter the image URL for your logo. In this example, I am using a Clear Books logo hosted on our Amazon server. You can also edit the layout and spacing as appropriate.
All email include the signature as shown in the example below.