Really stupid question: How do I adjust column width in GRC in NWBC?

Hi!

I'm trying to figure out how to adjust the column width in the screens in GRC 10.1 in NWBC. I've found where you can add / remove columns and how you can move columns around, but I can't get the columns to resize. I'm sure it's something really simple, but I just can't find it.

Thanks,

Krysta