Expand time tree checkbox
If the 3rd checkbox in the list on the Reporting Tab is checked, then when the Current Time Lords window is open and calculating time lords, it will automatically expand the nodes so that all time lords are visible (up to 4 levels). If unchecked, then you will have to expand the time tree to see the period onset times. You probably want this one checked to avoid having to click a lot. The exception would be is if you have all available time lord checkboxes checked below these 5, then you might want to have this unchecked, because it would be a long list otherwise.