//Refer-doc:https://fullcalendar.io/docs/contentHeight
var calendar = new FullCalendar.Calendar(calendarEl, {
contentHeight: 600
});
//or
var calendar = new FullCalendar.Calendar(calendarEl, {
contentHeight: "auto"
});
//You can dynamically set a calendar’s contentHeight after initialization:
calendar.setOption('contentHeight', 650);