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.
There are two ways to let your users to see your products images in a larger size:
1. You can enlarge the images by injecting this code to your form:
Here is how to inject CSS code to forms: How to inject custom CSS codes
You can change the width and height value 100 to the desired one.
2. The second method is by using our Product Lightbox widget that will allow your form users click on the image and they will pop up in a lightbox in a larger size.
Here is the demo form: http://form.jotform.co/form/33604136500846
And you find the widget description here: http://widgets.jotform.com/widget/product_lightbox
I hope this helps. Pleaes infomr us if you need further assistance with this inquiry.