Here you can change the admin level of the edited user.
The Admin level drop-down list offers the following options:
•None - the user won't have any rights for the room. In case of a private room, the user will be denied access.
•Join - in case of a private room, the user will be rid of their administrator rights, but will stay in the room.
•Admin - the user will have administrator rights for the room.
Additionally, you can click the user's name to edit their nickname and properties.