How to draw arrow heads at line ends
To draw arrow heads at ends of lines, first select
the lines you are interested in.
Then click on the Line menu,
and then either First End or Second End
and then choose the type of arrow head you want.
Arrow heads can be placed on lines, arcs, and open ends of
polylines and curves.
Note: Since arrowheads are small, at low zoom levels you may not be
able to see them. Zoom in to see the arrowheads.