How to hide page titles

Hello:

In wordpress, elementor settings there is a slide bar to hide page titles. I slid it to do so but it did not work. Elementor advises that “Elementor lets you hide the page title. This works for themes that have “h1.entry-title” selector. If your theme’s selector is different, please enter it above.”

So I have looked through the Krystal Lawyer edit theme pages and do not see where there is a “selector”

How do I hide page titles? Where is the selector and how do I change it?

Thank you.