To design a user-friendly interface for customer-facing displays in retail:

1. Clear typography: Use large, readable fonts for easy viewing.

2. High-contrast visuals: Ensure sufficient contrast between text, images, and background.

3. Simple navigation: Intuitive menus and minimal steps to access information.

4. Prominent product display: Showcase products with high-quality images and essential details.

5. Real-time updates: Display current prices, promotions, and availability.

6. Interactive elements: Incorporate touchscreens, gestures, or scanning for engagement.

7. Personalization: Offer tailored content, recommendations, or loyalty program information.

8. Consistent branding: Align the display's design with the retailer's brand identity.

9. Accessibility: Consider accessibility features like text-to-speech or font size adjustment.

10. Feedback mechanisms: Provide clear feedback for user interactions, like button presses or scan results.

11. Content management: Allow for easy content updates and scheduling.

12. Integration with POS systems: Seamlessly connect with point-of-sale systems for accurate information.

By focusing on these aspects, you can create an engaging, informative, and user-friendly interface for customer-facing displays in retail, enhancing the overall shopping experience.