Re: That's a Graflex, right (Force Awakens teaser trailer #2)?
I'm guessing this is because they used some kind of FX saber on set to make more realistic lighting effects. That's a pretty standard place to put the activation button on FX sabers.
So, on second viewing I really watched for this and...
both Rey and Finn ignite the saber using the red button the first time they do it, so someone on set is telling them that's what to do.
the visual dictionary is great, I also have the incredible cross sections book on order, does anyone know if there's a Lightsaber picture in there?
I'm guessing this is because they used some kind of FX saber on set to make more realistic lighting effects. That's a pretty standard place to put the activation button on FX sabers.