Which retail visual storytelling innovation, first widely adopted in the 1930s, revolutionized product displays by allowing customers to see merchandise without salesperson assistance?

The art of visual merchandising has transformed dramatically throughout history. From ancient market displays to modern digital showcases, retailers have used visual storytelling to captivate customers and drive sales. This trivia question explores a pivotal innovation in retail visual storytelling that revolutionized how products were presented to consumers and significantly influenced shopping behaviors in the 20th century.

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Self-service display cases
Animated window displays
Color-coded department layouts
Illuminated product pedestals