I am not sure if I am using the correct verbage but here goes: When I launch Thunderbird a panel opens in the upper left with all events that are in the past and not yet dismissed and all events for the current day that are not dismissed. I was in a hurry and instead of minimizing it I clicked the red x in the right upper corner. Now it does not dislay on startup and I cannot find a way to get it back since it has been there since I installed Thunderbird. I believe the correct name is Event Preview Pane but not sure. Any help is greatly appreciated.