Revit Architecture
Revit MEP
Revit StructureThe Family Category and Parameters tool assigns the properties of a predefined family category to the component you are creating. The tool is only available within the Family Editor. If the Always Vertical parameter is selected, this means the family always appears vertical at 90 degrees, even if it is on a sloping host, such as a floor.

Example: If you are creating a lighting fixture family, you can select the Lighting Fixtures category, and then select or clear the Always Vertical parameter.