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

At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.

We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.

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    How to increase width of Textbox field for Payment Amount in Payment Form

    Asked by kputegnat on June 08, 2015 at 08:19 PM
    On a final note, I have not been able to increase the text field size for Payment amount in the Authorize.net payment section.  I added size="20" to the field but it did not change.
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    JotForm Support

    Answered by Chriistian on June 08, 2015 at 10:11 PM

    Hi kputegnat,

    Thanks for contacting us.


    You can adjust the width of the payment amount in your form by injecting this custom CSS code:

    input#input_5_donation {

      width: 300px;



    To inject custom CSS code in your form, just follow instructions below.


    Do let us know if you need further assistance.