How to change the matrix column width?

http://form.jotformpro.com/form/41283532835960 is the form.  I need to change the width of the table.  The detail column should be as wide as possible. 

You can do it using the Inject CSS feature. Here are some examples:

http://www.jotform.com/answers/320839-adjust-column-width-of-matrix

http://www.jotform.com/answers/263160-How-to-change-font-size-and-column-width-in-the-matrix-survey-tools-