Drawing polyline
Use the command Polyline to draw a polyline.
Click Draw.
Click Polyline.
Click on graphic view to create the polyline. In the bottom bar of the graphic view you can activate/deactivate the object snap.
If this command is active 
the item will be saved in the subproject of Survey. With this command active the vertexes are topographic points.
The command has properties that are activated by right-clicking in the CAD window:
Connect all points up to
: allows to specify the last point in the sequence. All intermediate points will be connected by the polyline. For example start the polyline clicking on point 100, then right-click and select this option and click on point 105. All intermediate points (101, 102, 103, 104) will be automatically connected.Close
: allows to join the last vertex of the element drawn with the first. If the item was drawn by the polyline command, the option will create a closed polyline Line - tangent
: adds a segment using the same direction as the previous element. To create a line as tangent to the previous arc. Arc - tangent
: adds an arc tangent to the previous element. Arc - no tangent
: adds an arc without the constraint of a tangent to the previous element. Undo last point
: allows to delete the last vertex of the line or polyline. Extend
: extends the object while keeping the same direction but using as a reference for extension length a reference point. Intersection
: allows to extend the segment to the intersection with a reference direction.