Hi Tammy,
You’ll need to enter text mode and add the following text: usewidths=true width=150
You’ll have to play with the width number until you get something that works for you. If you then need to adjust any of the other column widths, just add the “width=###” line to text mode on those columns (you only need one “usewidths=true” per report, so you don't need to add it again).
Hopefully this helps!
Kathy