You can edit a file to make it bigger.
Just bear in mind it was designed that way to allow for side islands.
So it would not stretch out the center table and push the side islands off the screen.
Currently you use just the left island so you probably can fudge it bigger than 26.
Here is a old topic that still applies:https://www.ubbcentral.com/forums/ubbthreads.php/ubb/showflat/Number/256309