The document outlines the evolution of graphic user interface design over time, from early machine interfaces to current transparent design principles. It notes key stages as machine interfaces, software interfaces, skeuomorphic designs mimicking real-world objects, minimalist designs, flat designs, and now transparent designs that make interfaces see-through or hidden. Transparent design principles are described as see-through UIs, hidden UIs, egoless design without calling attention to itself, and having no physical interface.