UBB.threads PHP Forum Software Community Forums Resources and Customizing How Do I? change width and height of code box

I have in my notes that I changed something in ubbthreads.inc.php to change the height and width of the code box. I can't figure out what I changed... I think I was running 7.1.x when the change was made, now I'm running 7.5.3.

Thanks for your help,

Wayne