For accuracy, use object snaps to snap to locations on existing objects.

When object snaps are active, moving the cursor near a snap point on an object makes the marker jump to that point.

To turn object snaps on and off

1. On the status bar, click the Osnap pane.
2. Select or clear the check boxes for the object snaps you want to use. More…

Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015