How to create a 3D Polyline:

  1. Click on Draw > 3D Polyline on the Ribbon.

or

  1. Enter 3DPOLY in the command window.
  2. Specify the start point of the first segment.
  3. Specify the end point of the first segment.
  4. Repeat step 3 to define further segments.
  5. Press Enter to end the command.

or

  1. Enter Close in the command window, to close the polyline and exit the command 
    (at least 2 segments are required)


Note:

Enter Undo in the command window to undo the entry of a point.