Use this procedure to specify an offset for a curtain wall unit infill. By default, infills are centered on the curtain wall unit baseline. If your design requires that the infill be aligned with frame edges or some other part of the curtain wall unit, you can specify an offset for the infill.
Specifying panel infill offsets
In Plan view, positive numbers offset the infill above the baseline and negative numbers offset the infill below the baseline. The offset is also affected by the selected alignment for the infill.