The User Interface section of the Customisation page allows you to change the following areas of CloudManager
"Default Landing Page", when users login to CloudManager this determines which page they'll be shown, this is only if someone goes directly to CloudManager so if you've an SSO landing page this will not affect it.
"Enable Embedding", this will remove the header and footer from CloudManager and will allow embedding in an iFrame by slightly modifying the login process. This is to allow you to present two different views of CloudManager, one with and one without embedding, based on the URL. The URL should look something like https://mycloudpages.appspot.com?embedded=true&hd=yourdomain.com
When this is turned on, you also need to specify embedded=true as a query parameter in the CloudManager URL to fully enable embedding.
"Remove Footer" will remove just the footer from CloudManager and leaves the top bar.
"Hide Organisation Browser" this removes the organization browser from the browse page. This can be useful if you have a flat organization structure and have no need for the browser. When search results are selected they are still displayed on the browse screen.
"Multiline Person Header", instead of having a users details on a single line such as Name, Title, Role, Company this will instead be split out and each item will be provided line by line instead.