In the Administrator role, you can select a logo from a preexisting list of media in Commerce Cloud or upload a new image, and use that logo as the company default on the Assisted Cloud Selling Service app.
Log into the Commerce Cloud Dashboard using your admin user ID and password.
Click Settings.
Click Assisted Selling App Setting.
Click on the Dashboard tab
Click Header Logo.
Upload a new image or select one from the Cloud Media Library. For your reference, the header logo would display in the section of the screen image to the right that is highlighted in red.
Image size should not exceed 200mb, or be larger than 242 by 78 pixels. Supported formats include: .jpg, .png, .jpeg, .gif