where it the Output To Lights box?

[dhollida55]

I have a 12 ribbon mega tree set up in xlights on a falcon F16V3 controller.  I am able to test the lights on the controller.  I can also test the lights in Xlights.  But when I try to run a sequence the lights don't work.  I know there is an Output to Lights button.  But I can't seem to find it. 

[horathgar2000]

Click on the White Lightbulb in the sequence tab it should turn Yellow