You need to select a part of the building (floors, compartments, the whole building) and a program. A minimum program is just the current number of people, the future number of people, the flex ratio to apply and the type of space to use (Bench in an open space, closed office…).

The system will come up with a zoning. You can save it and modify your scenario to make it more detailed or realistic depending on the results of the zoning.