Construction lines are non-persistant entities which are used as aids in the construction of polylines.

The lines are displayed in a light orange color with a dot at the midpoint. This midpoint is referenced by either the endpoint or midpoint object snaps.

To draw a construction line, select the new LINE icon on the toolbar. Click on the start and the end points for each line.

The last line drawn can be erased with CTRL-Z or the Undo Last Line item on the Modify menu. All construction lines can be erased with the
Clear ConstLines item on the Modify menu.

Construction lines are not displayed in QUERY mode and are never printed.