scale: 'CellDuration', cellDuration: 720,
Nevertheless I want to hide the line between the two halfs of a day. See please the attached image. Is this possible?
You can use onBeforeGridLineRender to hide selected grid lines in the Scheduler: https://api.daypilot.org/daypilot-scheduler-onbeforegridlinerender/
You can also use a different approach - set scale to "Day" and implement custom snap-to-gird rules: https://code.daypilot.org/39403/javascript-scheduler-customized-snap-to-grid
If I set the scale to "Day", then I'm not able to show half-day events. Is this the normal behaviour or am I doing something wronge?
By default, events are aligned with the grid cells. You can customize this behavior using "useEventBoxes" property: https://doc.daypilot.org/scheduler/exact-event-duration/