In this lecture, we explore Interior Design Technology in visual merchandising, emphasizing modularity, portability, foldability, and DIY solutions. These concepts enable adaptable, space-efficient designs that enhance functionality and user experience. Modular elements allow for easy reconfiguration, while portable and foldable designs improve mobility and storage. DIY approaches empower users to create personalized, cost-effective interiors. These innovations play a crucial role in retail, exhibitions, and compact living spaces, making design more dynamic and accessible.