To reproduce:


Set the following property:
this.scheduler.SchedulerElement.EditorManager.EditorViewMode = SchedulerEditorViewMode.EditorDialog;


After that when editing an appointment a small dialog should appear on the side of the appointment.


You will notice that it is very hard to make the dialog appear and it is not very clear at what conditions.


Workaround:


Show the dialog whenever you need it. For example, when an appointment is clicked:


this.scheduler.SchedulerElement.EditorManager.EditorViewMode = SchedulerEditorViewMode.EditorDialog;


this.scheduler.MouseClick += scheduler_MouseClick;


void scheduler_MouseClick(object sender, MouseEventArgs e)
{
    if (this.scheduler.ElementTree.GetElementAtPoint(e.Location) as AppointmentElement != null)
    {
        this.scheduler.SchedulerElement.EditorManager.BeginEdit();
    }
}