In your WordPress admin, go to Pages - Add New:
Page Title & Description
If the page title is enabled in Theme Options, it will show up on top of every page and will generally look like this:
URL Slug (Permalink)
First, make sure you set the permalink structure in Settings - Permalinks. URL slug should be auto-filled as page title, but it can be changed (usually for display / SEO purposes)
Featured images on pages will only show up as background on page title (if enabled in Theme Options).
These options will overwrite theme options settings for the current page only.
You can either use Gutenberg (default) editor or Elementor Page Builder (Edit with Elementor).