What is the primary purpose of using a grid in layout design?

The primary purpose of using a grid in layout design is to create structure and organization. Grids serve as a framework that helps designers align elements on a page in a consistent manner, ensuring that the layout is visually pleasing and easy to navigate. By using a grid, designers can effectively organize content, establish rhythms and hierarchies, and create a cohesive look throughout the design. This structured approach aids in guiding the viewer's eye and helps maintain a sense of balance within the layout.

Other options, while related to different aspects of design, do not focus on the primary function of grids. For instance, supporting color selection pertains to the color theory and palette development, which is a separate consideration from structural layout. Managing typography addresses how type is arranged and styled but does not encompass the broader organizational benefits provided by a grid system. Similarly, enhancing multimedia content speaks to media management rather than the foundational organization that grids provide, which is crucial for effective layout design.