This tutorial covers the steps that you may follow in order to customize the Free Pass popup form.
To begin, navigate to the Toolbar > Edit with Elementor > Free Pass From Popup
Or go to Templates > Popups > Free Pass From Popup > Edit with Elementor. Control the layout, conditions, rules and styles of the popup.
Open the Navigator feature for having easy and quick access to each element of the popup form:
You can check these links for more details:
https://elementor.com/help/navigator/
Guide to Vamtam Elementor Builder
How to Trigger an Elementor Popup on a Button Click
https://www.youtube.com/watch?v=-29XXbJLnQM
https://elementor.com/help/how-to-trigger-a-popup-on-a-link-click/