Maintenance Manual

"Important" Participants
For each conference, one active participant can be set as "important". This means that the MCU considers this
participant first when deciding which contributors to show in which layout panes, rather than their position in the list
being set by how loudly they are speaking. See the Control setting in the conference participant list.
"Important" Participants Combined with View Focus
Both "Changing view focus" and "Important participants" above involve a single specific participant being shown in
the biggest pane available, even if that participant is not currently the loudest speaker. This causes a potential
conflict, which is resolved dependant on the type of layout.
In this type of view (a layout in which all panes are of equal size), the focused participant is shown in the first pane,
the one at the top left. The important participant is shown in the "next" pane, normally the one immediately to the
right of the first pane.
This type of layout displays a single big pane and several small panes. If the view focus has been changed (for
instance with left and right far-end camera control operations), then the big pane shows the selected participant. If a
conference participant has been set to "important" then its video stream is shown in the big pane.
However, if a participant has been set to "important" and the view is focused on a (different) specific participant, the
focused participant is shown in the big pane, and the "important" participant is shown in one of the small panes.
If the view has been focused on a participant and the same participant is also set as "important" then that participant
is shown in the big pane.
These layouts have two large panes and several smaller ones. If the view focus has been changed (for instance with
left and right far-end camera control operations), then the upper or left large pane shows the focused participant. If a
participant has been set to "important" then that video stream appears in the lower or right large pane.
If the same participant is focused and "important", that video stream appears in the upper or left pane.
For these layouts, if the view has been focused on a particular participant, that participant appears in the upper or left
large pane. If a participant has been selected as "important", that participant will be shown in the lower or right large
pane.
In layouts with three large panes, even if the view is focused on a specific participant and another has been set to
"important", one large pane remains. This pane displays the "loudest" remaining participant.
Clipped Panes
The majority of the conference layouts defined by the MCU, for example:
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