Lets you create reference points for convenient snapping to 3D points, or for use as input to tools that require a point.
Reference points mark a 3D point in the scene. They are useful as placeholders for coordinates you want to remember or snap
to, and as input to tools that require a 3D point.
Construction Point Options
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Show the name of the point next to it in the view window. This option is off by default.
