In the Planner it is possible to filter on only definitive bookings or definitive bookings in combination with preliminary bookings.
1. Click the filter icon and toggle "Bookings":
2. In the column "Bookings" you can choose to display either definitive or definitive and preliminary bookings in conjunction.
In the example "Robert Smith" total bookings is 200 + 45. The first number before the "+" sign indicates the definitive bookings while the numbers after the "+" sign indicates the preliminary bookings.