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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.

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    How to customize the Matrix field using CSS codes?

    Asked by photokc on March 03, 2016 at 04:13 PM


    I used the Matrix tool with the text box input type. 

    1. Can I control the length of the text box to make it bigger?  How can I edit?

    2. The row headings have a lot of empty space after them on the iphone or other devices and the text boxes are all very small.  How can I edit for mobile?

    Thank you

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    JotForm Support

    Answered by Kevin_G on March 03, 2016 at 05:46 PM

    Please, inject this CSS code:

    @media only screen and (max-width: 40em){

            .form-matrix-row-headers {

                width: 10% !important;

                word-break: break-all;

                min-width: 0px !important;



    This should be your result:

  • Profile Image

    Answered by photokc on March 04, 2016 at 09:45 AM
    Thank you that worked!
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    JotForm Support

    Answered by Nik_C on March 04, 2016 at 11:41 AM

    On behalf of my colleague Kevin, you're welcome, we're glad it worked for you.

    Do not hesitate to contact us in future for any issue.

    We'll be more than happy to help you.

    Best regards.