This practice involves analyzing visual language and design anatomy. Brands use visual language to communicate features three-dimensionally. Many brands have developed their own visual grammar, consisting of design elements organized by principles that convey specific meanings (semantics) to users. This visual grammar also strategically associates with functional necessities and brand identity.
Take an in-depth look at existing products, and identify how it applies their visual language. Then use the explanatory sketch as means to study usage scenarios, inspirations, internal components, assembling, material choice, manufacturing process, and even a backstory.