column width

Yes, this must be done in the CSS, but changing columns widths requires there be enough width on the page to accommodate the data. If you need more width, it’s a little complicated, but also needs to be done in the CSS.

To set the width of a column you only need to set the width of the “TH” cell in the top row. Each of those cells has a class name that identifies the field, so you can target an individual column with your CSS.