In Version 4.7, the user was able to narrow the radio button column width to increase the size of the question columns. We are unable to determine how to do this in Version 5. Please see the attached screen shots of the differences (first page shows how the adjusted column widths; second page shows what it looks like in Version 5). Can you please provide instructions on how to adjust the column width?
If you click on the radio button column on the Columns tab of your Matrix item, then navigate to the Column Options tab on the column pop-up you will see a field to set the width of the column.
Let us know if you have any other questions.