I also need to format a specific matrix tables textboxes' width but I can't figure out what css code I should use.

I also need to format a specific matrix tables textboxes' width but I can't figure out what css code I should use. I tried following the steps above but I'm not sure how to locate the main id and how to customize.

Here is the form link: http://form.jotform.us/form/50963867216161

and here is a shot of what the matrix curently looks like, I want the fillable text box width much wider. Can we make it show the entire data that is entered (it can get lengthy)?

It is possible to check the field ID and then combine it with the input type.

See example:

#id_14 .form-textbox {
width: 90%;
}

Field #id_14 and .form-textbox text box input class. 

Thank you.