null pixels

[rickswa]

I'm having to add a null pixel this year for a longer run of cable from the controller to the first pixel.  I'm using an F16v3 with 2 expansions.  Will I have to "add" a pixel to the run of 84 that the null one is going to be put in before in xlights or is there a way in the F16 to define that a null pixel will be put in that line? 

[allknowing2012]

If its a true null pixel/ f-amp then no - it is invisible to the controller. If it is just a simple pixel that you are using as a null, then yes add 1 to start (or end if capable) of the prop in question.