If you are talking about NS mode, then make use Source Ellipse or Rectangle with the following setting: xtMN<4#E
,=whwl "tA
Source Distance = 0 ~?4'{Hc'
>Vz Gx(7q
Then use Source X and Y to adjust the angle of emission $BKGPGmh
v1%rlP
Hope this helps :)