...
The logo should fit within a 300x300px box. Some dealers may choose to shorten the height of this box for a horizontal logo to keep it closer to the bottom corner of the photo, but it should not be any taller than 300px, and the width should always be 300px.
Adding to the CDN
To add a watermark to an account with a single domain, use Filezilla to add an image file named “watermark.png” to the images folder inside the domain’s main folder in the CDN (https://assets-cdn.interactcp.com/). This can only be completed if you have FTP access to the CDN.
...