A QUICK QUESTION FOR RMXP

So, I've been tinkering around in XP's scripts trying to make the default menu how I want it, but I can't seem to shrink down the right side part with the actors on it. I was wondering if there's an easy way to do this so it only has enough room for one actor since you'll only be controlling the actor already on there. This is what I mean:



It just seems a bit odd how it is, so what should I do to fix this? :o

Thanks, lol I got it setup right now~ ^o^