To assign admin roles to your Facebook page, click Settings at the top of your page, then Page Roles.
To add a new Admin, click Add Another Person at the bottom of the page and begin typing in their email address. You may only add friends or people who have already liked this page. If you need to add a non-friend make sure they like the page first.
In order for additional admins in Facebook to edit with Pagemodo, their admin role must be "Admin" or "Editor." Click here for more on Page Roles within Facebook.
Additional admins do not need a Pagemodo account in order to perform edits. An edit button will appear for page admins and when they click it, it will launch a modified Pagemodo interface that will allow them to access a limited number of features.
For more on adding and removing admins, check out these articles from Facebook’s Help Center: