What controls the available area plan types?

The option addressing area plan types is accurate because "Area Schemes" define the specific configurations and types of area plans that can be created in Revit. These schemes allow users to categorize and manage different spaces within a project, enabling the effective analysis of areas for various purposes, such as space planning, room utilization, and compliance with building codes.

Area schemes can include parameters like occupancy types, departments, or any other classifications relevant to the project's requirements. By using area schemes, architectural professionals can easily generate area plans that reflect the intended use and parameters for spaces in their designs, leading to more informed decision-making throughout the project lifecycle.

While color schemes define how areas are visually represented in plans, and floor plan types manage the views of different levels or sections of a building, it is the area schemes that specifically dictate the structure and classification of the area plans themselves. Area boundaries play a role in defining the limits of the areas but do not configure the underlying types available. This understanding emphasizes the foundational role of area schemes in organizing project space within the Revit environment.