Blackboard Collaborate Gallery view currently allows Moderators to see up to 25 simultaneous video feeds (Presenters and Participants will get access to this functionality at some point in the future). With the Gallery, Tiled and Speaker view options moderators have greater control over how they see their students.
Once you have joined a session, click on the view icon (top right corner) from the view menu and choose Gallery, Speaker, or Tiled view. Moderators will always appear first in gallery view followed by presenters.
If you cannot see the Gallery view, please make sure you are a Moderator (not a Presenter or Participant).