Conditionally hide and show different form elements depending on your field values.
When editing a form element or container, you can specify conditions for when the element should be hidden from the end-user in the Show or Hide Conditionally section. This is useful for filtering collections of items and hiding and showing:
Answers to questions
You can access this interface by clicking on an element or container in the Designer, and then going to its properties tab in the right sidepanel and clicking + New Rule under the Show or Hide Conditionally section.
See the detailed discussion of Logic Conditions for a list of comparator options and what they do.