When starting an event, it is advisable to use collections to separate them into different groups. Click on the 4 squares icon and then the '+ New Collection' button. You can then name the collection and start to add events to it by clicking on the '+ New Event' button.

You can also choose to start an event that will not be saved under any collection if this is not appropriate for certain events or recordings. From the Home screen, you can click on the '+ New Event' button.