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:
You can also use a different approach - set scale to "Day" and implement custom snap-to-gird rules:
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: