What is described as a setup and structure feature used to mark specific part locations on a print?

The correct answer is a grid. In technical drawings and prints, a grid is used as a setup and structure feature that helps in marking specific locations of parts. Grids consist of a series of intersecting horizontal and vertical lines that create a coordinate system. This allows for precise placement and alignment of components within a given design or layout. By providing a visual reference, grids make it easier for engineers and machinists to identify coordinates and measurements, which enhances accuracy and efficiency in manufacturing processes.

Using a grid can significantly streamline the workflow, especially when dealing with complex designs that require specific measurements to be adhered to closely. It decreases the chances of errors by providing a clear layout for where parts should be positioned. In contrast, a legend provides information about symbols used in the drawing; a key might refer to a list of designations or explanations of features; and a frame typically refers to the boundary line encapsulating the drawing. While each of these elements has its role in technical documentation, it is the grid that specifically serves the functionality of marking precise locations within the design.