Custom questions allow you to create your own pre-screening questions. You have full control over the question and the possible responses, giving you ultimate flexibility.
To set them up...
Go to Settings > Showings > Pre-screening templates
Edit a template (or create a new one).
Click Add custom question at the bottom.
Enter the question you'd like to ask each prospect.
Prospects will have two responses they can choose between. Enter the options you'd like to present them, and choose if that response means they're qualified or disqualified.
Click Update to save the template.