1. Log in to your Client Area.
2. Click on your username and select Contacts/Sub-Accounts option from the drop down.
3. On the new page that opens, fill all the necessary details and assign required privileges to secondary account.
4. Check Activate Sub-Account option to provide client area access to this sub-account.
5. You can also set Email Preferences as which type of emails should be sent on this email address.
6. After filling up the required details of sub-account, click on the Save Changes button.
That's It !
Check out the video tutorial to know in-detailed procedure. You may refer to the blog as well.