Use this procedure to change the vertical position of windows in a wall to which the windows are anchored.

Window position along the Z axis parameters
| If you want to… | Then… | 
|---|---|
| use the bottom of the wall height as the reference point | under Position Along (Z), select Bottom of wall height for From. | 
| use the center of the wall height as the reference point | under Position Along (Z), select Center of wall height for From. | 
| use the top of the wall height as the reference point | under Position Along (Z), select Top of wall height for From. | 
Use a negative value to measure from endpoint to start point.
| If you want to measure to… | Then… | 
|---|---|
| the bottom of the windows | select Sill (Bottom) of object for To. | 
| the center of the windows | select Center of object for To. | 
| the top of the windows | select Head (Top) of object for To. |