[Single Line]command generates a line segment from specifies 2 points.
While Specify start point
prompt is displayed,
locate the start point.
Typing A key, [Angled] command is invoked.
Typing E key, [Extend] command is invoked.
Typing F key, [4 Points] command is invoked.
Typing N key, [Face normal] command is invoked.
Typing P key, [Normal] command is invoked.
Typing T key, Tangent] command is invoked.
Typing B key, Both(Yes/No) is toggled. When Yes, the 1st input point is the mid point of the line segment.
While Specify End Point
is displayed,
locate the end point of the line.