Zara also relied on significant centralization of store window displays and interior presentations in using the stores to promote its market image. As the season progressed and product offerings evolved, ideas about consistent looks for windows and for interiors in terms of themes, color schemes, and product presentation were prototyped in model window and store areas in the headquarters building in Arteixo. These ideas were principally carried to the stores by regional teams of window dressers and interior coordinators who visited each store every three weeks. But some adaptation was permitted and even planned for in the look of a store. For example, while all Zara in-store employees had to wear Zara clothes while working in the stores, the uniforms that the sales assistants were required to wear might vary across different Zara stores in the same city to reflect socioeconomic differences in the neighborhoods in which they were located. Uniforms were selected twice a season by store managers from the current season’s collection and submitted to headquarters for authorization.