As described above, a user privilege level confers a certain level of control over a conference, with that level of control possibly depending on whether that user is the conference owner or not. These conference control levels have the following meaning:
This level of control permits the following operations:
With full conference control, a user is able to disconnect participants, connect new participants to the conference, and end the conference whenever they want to.
A user with full conference control can view and modify any aspect of the conference's configuration. This includes the start time, end time, or repetition characteristics, whether streaming is enabled, and which endpoints are pre- configured as participants.
When the conference is in progress, a user with full control is permitted to send a text message to all connected participants' video displays and change the Conference custom layout.
Additionally, full control includes all of the operations covered by limited control, detailed below.
This level of control permits the following operations:
The participant list shows the names of the endpoints currently connected to the conference, a summary of that endpoint's status and, if they are a video participant, a thumbnail preview image of the video stream they are supplying. Thumbnail previews are shown by default, but you can configure the user interface not to show them. The setting that controls this is the Show video
thumbnail images option on the 
page. Note that the MCU will not show thumbnail previews on the participant list page if encryption is required for a conference. However, thumbnail previews will be shown for conferences where encryption is optional and there are encrypted participants.
Via the participant list, it is also possible to mute (or stop muting) individual endpoints' audio, change the conference's "important" participant, and enable or disable the participants' ability to affect their own layouts via
This includes being able to choose what view layout (or family) is used for constructing the conference view being sent to a participant, changing the
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