Sometimes a featured image, when used as a hero-type header needs more viewable space. This theme includes a setting to change the hero image height. The only caveat to this option is that this will apply to all posts when using the Hero post layout.
The default height is set to 450px, but you can change that from the customizer.
- Go to Appearance > Customize > Post Options
- Look for the Minimum Hero Image Height setting and move the slider to your preference. If you navigate to a full post in the preview window, you can see it change, live.
- Click the Publish button.