What is the term for a starting point for a sketch on the XY, XZ, or YZ axes?

The term that refers to a starting point for a sketch on the XY, XZ, or YZ axes is "Principal Work Plane(s)." In 3D modeling and design, principal work planes serve as the foundational surfaces from which sketches can be created. These planes correspond to the three main axes in a Cartesian coordinate system, which are crucial for defining the orientation and geometry of the sketch in relation to the 3D space.

Understanding principal work planes is essential for establishing the geometry of a model. When beginning a sketch, designers select a specific work plane to ensure that the features they design accurately relate to the overall dimensions and specifications of their project. Selecting the appropriate plane allows for proper alignment and placement of sketches, ensuring that subsequent modeling operations effectively build on this initial geometry.

The other terms listed do not fit this context adequately. "Project" generally refers to a specific endeavor or task in design but not a spatial reference point. "Properties" relate to the attributes of an object rather than its spatial base, and "Projected View" describes a representation of an object in another view but does not serve as a starting point for sketching.