What are axes used for constructing references for creating sketches or features called?

Construction axes serve as essential tools in CAD software for setting up reference lines that help in the creation of sketches or features. These axes are not part of the final design but provide a framework or guide to ensure that elements are aligned accurately and symmetrically. They help in defining parameters and positions for features like holes, extrusions, and other geometric entities.

In many CAD applications, construction axes allow designers to quickly establish a coordinate system or a reference plane, facilitating the accurate placement of components within the design. By using construction axes, users can easily create complex geometries by ensuring that their sketches adhere to certain constraints or align with specific design elements.

Other options may refer to similar concepts but do not specifically designate the primary function of providing a reference guide in the context of constructing sketches or features. Therefore, construction axes are the appropriate term for this purpose in CAD software.