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.
Yes you can do that - Just set the dropdown field to be hidden by clicking the blue down arrow icon > then HIDE FIELD:
Then setup your condition as needed. Here's a quick example:
Related guide: Smart-Forms-Using-Conditional-Logic
Hope this answered your question :)