I'm not sure if this is the right area to be asking this but I didn't see any forum better suited.

With double page spreads the guidelines tell me to cut the excess from the two pages but I'm not sure if I'm supposed to draw through the trim into the adjoining page or stay in the live area for both and leave the center trims blank?

If anyone has done a double splash page that I could check the line art out to get an idea I'd appreciate that too. I just can't wrap my head around how to continue drawing from one page onto the next.