Quick Summary
Impersonating a user:
On the Users screen, click the 3 dots to the right of the user's name and then select 'Impersonate User'. This will open the site in a new tab and you will be logged-in as if you were the user.
It's important to note the URL as you navigate around the site as the user. The URL will have something like this appended to the end of the URL: ?doAsUserId=FJxR107KHHyAlf71ly7QZA%3D%3D. You can copy this parameter and paste back into the URL if the impersonation is lost, which can occur if you navigate to another sub-site of GLOBE while impersonating someone.