Which tool is used to create symmetrical copies of objects in a design?

The tool used to create symmetrical copies of objects in a design is the mirror tool. This tool allows users to create a mirrored version of selected objects across a specified axis or line, effectively creating a symmetrical counterpart that maintains the same distance from the axis as the original object. This is particularly useful in design scenarios where symmetry is important, such as in architectural or mechanical designs, allowing for efficient duplication and the maintenance of balance in the graphical representation.

In contrast, the other options serve different purposes. The measure tool is primarily used for assessing distances and dimensions within a drawing but does not create copies. The pattern tool, while useful for creating repeated arrangements of objects, does not specifically focus on symmetry as it can allow for non-symmetrical repetitions based on defined parameters. The press pull tool is utilized for manipulating 3D shapes by extending or retracting faces, rather than duplicating objects in a mirrored fashion. Thus, for creating symmetrical copies, the mirror tool is the appropriate choice.