Fig 5.1 below shows a small layout of road represented by 3D Polyline
Fig 5.1

Fig. 5.2 below shows the
vertices of the 3D Polyline marked with Points by choosing the option Points
under What to place?
Note: the points marked can be placed in the Source object layer
or Current layer by choosing under Which layer to place?
Fig 5.2

Fig. 5.3 below shows the
vertices of the 3D Polyline marked with block symbol by choosing the option Blocks
under What to place? and specifying required Scale Factor
and Rotation angle under Insertion Settings.
Note: the block symbols can be placed in the Source object
layer or Current layer by choosing under Which layer to place?
Fig 5.3
