Clicking the Edit domain.com button shows global settings about the domain. From here you can change mail Delivery options, set maximum email users, storage quotas.
* Domain Comment - This should store notes and exceptions for about the domain
* Mail Delivery - Should usually be set to deliver to MX host with a  matching
DNS MX record. 
* FTP Password - This is also the password to the Customer Control Panel	
* Domain Services - Each service enabled for the domain must be highlighted	
* Max Email accounts - ISP staff can set a maximum number of accounts	
* Max Virtual Hosts - 	ISP staff can set a maximum number of virtualhosts
* Max Storage Space (in MB) - set a space quota	
* FTP Access - FTP access can be enabled or disabled	
* Locked - Locking a domain means that it cannot be changed unless unlocked by
an administrator.
* Delete Domain - This erases *EVERYTHING* about the domain, including user
email accounts, and websites. BE CAREFUL.