Introduction to 3D Design - Autodesk AutoCAD 2013 Practical 3D Drafting and Design - page 14

3DOsnap tool
Starting with Version 2011, AutoCAD allows you to specify 3D object snaps. Also,
here we can access predefined 3D osnaps keeping 3DOSNAP ( F4 ) on, or we can
access them individually. There are osnaps for vertices, midpoints on edges, centers
of faces, knots (spline points), points perpendicular to faces, and points nearest to
faces.
Exercise 1.1
Using the LINE command, coordinates, and auxiliary tools, let's create a cabinet
skeleton. All dimensions are in meters and we start from the lower-left corner. The
ORTHO or POLAR button must be on and the OTRACK and OSNAP buttons with
Endpoint and Midpoint predefined.