You can navigate to Settings > Ontology > Ontology Status screen to see the following information:

Number of Product Types: This is the number of products that are captured by Chronicle SOAR from your environment. This number is in flux as more products are added to your environments.
Number of Events Types: This is the number of events that are captured by Chronicle SOAR from your environment.
Number of Events assigned to Default Families: This is the number of events that have been automatically assigned by Chronicle SOAR to default families. At any stage, you can look in the Family Name column for Default, click the Configure icon and assign them to a different model family.

You can select Ontology status rows using the checkboxes and export them as a zip file containing JSON file. You can also choose to import Ontology status rows. Make sure to import a zip file containing a JSON with ontology details. 

To change the Model family or the field Mapping, click on the Configure icon. Refer to Event Configuration for full details.