Challenger Pro adds a sticky header option that allows the header to stay fixed at the top of the screen at all times. To enable the sticky header option:
- Visit the Customizer (Appearance → Customize)
- Click on the Sticky Header section
- Switch the Enable sticky header setting to "yes"
- Click the Save & Publish button at the top of the screen
By default, the sticky header also applies to mobile devices, but you can disable this with the Make sticky for mobile devices? setting.