A Loaded Path (sometimes called Filed Path) is one that was previously created in the Designer and saved with a .PTH extension.
A Loaded Path can be of any type and are stored in the Models folder. Sample loaded paths such as Circular.pth, Elliptic.pth, Helix.pth, Parabola.pth, and Spiral.pth are included.
Note the Node/Vertex Tool can be used to modify the shape and number of points describing the path.