A locus is a reference point that is used to draw and measure objects. Loci do not print.
Turn on Snap to Objects from the Snapping palette to snap to loci (see Object Snapping).
The 2D Locus tool places a 2D locus in a drawing. Because they are merely movable reference points, loci cannot be reshaped or resized.
To place a 2D locus:
1. Click the 2D Locus tool from the Basic palette.
2. Click to place the locus.
The locus properties can be edited from the Object Info palette.
The 3D Locus tool places a snappable 3D locus or reference point onto the drawing. Like 2D loci, they are reference points. They can be moved, but they cannot be reshaped and they do not print.
To place a 3D locus:
1. Click the 3D Locus tool from the 3D Modeling tool set.
2. Click to place the locus.
The locus is placed on the working plane unless it is snapped to an object. The locus properties can be edited from the Object Info palette.
