Break field
Description
If you check Has group breaks then the next step is to define the Break field property. The Break field property is the field in the List on which to break.
Defining a Break Field
For example, here are fields for a static data source defined in the Static Data property.
After defining the data, check the 'Has group breaks' property.
On the Break field property click the button to see a list of available fields and select one.
Run in Live Preview. Everytime there is a new value in the selected field, a group break will be displayed.