MyAdmin Tabs / Overview
Simply put, MyAdminTabs makes it easier and less time consuming to edit your store because it puts the administration links into your store making things like editing pages easier to do.
The way it works is that you make a list of the customer accounts that will have super user access to the admin menus.
Miva Merchant administration security is 100% maintained because the administration links won't do anything unless the person is also logged in as a miva merchant administrator.