3D Object Snap (Status Bar Button)

Snaps the cursor to precise locations that are unique to 3D solids, surfaces, and point cloud segments. Snaps the cursor to the nearest 3D reference point, as you move the cursor. For example vertexes, midpoints on edges, nearest to face, and so on.

Find

Clicking the arrow next to the button displays a menu for specifying the persistent object snaps.

3D Object Snap is turned on.
3D Object Snap is turned off (default).
Linked To 3DOSNAP, 3DOSMODE
Shortcut Key F4