Amount of displayed groups

Hi,

is there a way to display more than 2 Groups in the Calendar?

After adding a third contact, I got a button to switch to the next Contact, but the max amount of displayed Contacts is limited to two, .

I guess there should be a property to set the amount of displayed groups, but cannot find any information about that in the help.

<C1:C1Scheduler x:Name="Scheduler" GroupBy="Owner" DockPanel.Dock="Left" Style="{Binding OneDayStyle, ElementName=Scheduler}">

regards