I'm new in DayPilot. I'm tring to use the lite version. In scheduler mode the control show hours form 0 to 24. There is a option to show only hours from 09:00 to 20:00 for example?
From your DayPilotCalendar object, look at the "Business" named properties.
The Scheduler control (http://www.daypilot.org/scheduler.html) doesn't support hiding individual columns in the Lite version. In the Pro version, you can use BusinessBeginsHour, BusinessEndsHour, and ShowNonBusiness properties.
As Steve noted, the Calendar control (http://www.daypilot.org/calendar.html) supports hiding the non-business hours using a combination of BusinessBeginsHour, BusinessEndsHour, and HeightSpec: