If you are talking about NS mode, then make use Source Ellipse or Rectangle with the following setting: ipU"|{NK
-Tz9J4xU&
Source Distance = 0 K0+J!-a]7
j?.VJ^Ff/u
Then use Source X and Y to adjust the angle of emission %/sf#8^m
DtZkrj)D/
Hope this helps :)