Tooltips are displayed for items and for the column headers in the timetable view. Tooltips are only displayed if the Calendar.ShowToolTips property is set to true. The item tooltip is formatted according to Calendar.ItemTooltipFormat property. Item tooltips can be additionally customized by handling the ItemTooltipDisplaying event. The column header tooltip displays the text contents of the column header and can be customized by handling the TooltipDisplaying event.