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.
Thanks for contacting us. You can do that by using the form's source code. Please refer to this user guide on How to get your form's source code. After getting the source code you need to paste on a text editor and modify specific HTML codes on the Matrix.
Find the textboxes of the Matrix and add a placeholder= on them this should place a hint on the textbox. Save the HTML file and host it on your server.