Align top edges of lines?

I have a black 6 pt box and a red 4 pt line.  I want the red line to align with the top edge of the box (showing 2 points of black underneath).  When I use "align top," the red line is centered on the top line of the box (showing 1 pt of black above and 1 pt below).  Must be a simple way to do this.  Appreciate any help.