One more vote to create the shortcut hotkey. particularly I like the suggestion to create a short list of those who will present and then SHORTKEY+1, SHORTKEY+2, etc. The short list could be nothing but the list of Co-Hosts which we currently create to keep names near the top of the Participants list so that we can find them to spotlight. Currently using the mouse to spotlight, and it is far too easy to miss entirely, spotlight someone else, or create an action that disrupts the flow of the activity.