Up to 100 participants can be connected via ONE eyeson room where 9 of them can be visible on a screen.
This means that 9 people can present content to the meeting at the same time. This works dynamically, if e.g. one of the active camera participants switches the camera off, someone else out of the 100 people can switch the camera on and share content.
Note, that in layout settings you can always manually define who you want to see on a screen. Manually 1, 2 or 4 places are available, while automatically 9 positions are set up.