In the Family Editor, open a floor plan view of the family.
On the Properties palette, select the Room Calculation Point parameter in the Other section. The point is now visible in the drawing area as a green dot.
Select the Room Calculation Point and move it to a location that will not be obscured by geometry when placed in the project.
Note: If the family needs Room Calculation Point adjustment in the Z-axis, open an elevation or 3D view to access movement controls. Relocate the point similarly.
Click Modify tab Family Editor panel Load into Project.