Hi Marcin,
Thank you for your patience.
We have checked your requirement of changing the size of appointment view in month cell. As per scheduler implementation if you set
AppointmentDisplayCount to 1, appointment size will be 1/3 of month cell height, this is the maximum height of appointment in month cell and since the size is small content wrapping support is not provided.
You can achieve your requirement by using custom DataTemplate for monthcell. We have prepared a sample for your requirement, kindly check the sample.
In our sample we have used Label for date text and TextBlock for Appointment view. But with custom template, drag and drop will not work.
You can also check our UG documentation to know more about customizing month cell appointment view,
We hope this helps. Kindly revert us if you have any concern.
Regards,
Karthik Raja A