2011

If the most recently drawn object is an arc, its endpoint defines the starting
point of the line, and the line is drawn tangent to the arc.
Close Ends the last line segment at the beginning of the first line segment,
which forms a closed loop of line segments. You can use Close after you have
drawn a series of two or more segments.
Undo Erases the most recent segment of a line sequence.
1042 | Chapter 12 L Commands