Multi User - Emulate Session
In the Master User's front-end dashboard select, 'Manage Users' from the left bar, choose which sub-user account you wish to emulate clicking on 'Login' from the options on the right.
The session will then be changed to the chosen Sub User. The Sub User's account can now be controlled as if logged in as normal as that Sub User.
To return to the Master Account view, click on 'Restore Session' at the top right of the page, as shown in the image below.