If you are talking about NS mode, then make use Source Ellipse or Rectangle with the following setting: 4'*K\Ul).H
~:Nyv+g,$
Source Distance = 0 e2F7G>q:5
@e/dQ:Fb
Then use Source X and Y to adjust the angle of emission <Z[R08 k
W ,+91rup
Hope this helps :)