Before you add an administrator, make sure you're familiar with the process of logging into Manifest and adding normal users. We have a walkthrough here: https://kb.wisc.edu/chm/129690

Adding an administrator to your Manifest

Administrators have the ability to add or remove NetIDs from your manifest list, and thus grant or remove access to folders in research/restricted/CHM drive. Having an admin is a good idea if you have a study with a lot people needing access - for example, adding and removing student workers from a study folder.

To add an administrator, open the "-admin" manifest list in your group. Navigate to the "privileges" tab and click on "add privilege" 

• Enter the NetID of the person in the "add individual privilege" box. 
• Click on "add individuals"
• After clicking, the "privileges to add" area will appear. Choose whatever level you deem appropriate ("Admin" allows for all privileges - read, write, delete, update, etc.)
• Hit Save

That's it! This person is now an admin of your manifest lists and can now add and remove people!