Use the Line command to construct Lines in a drawing.
To construct a Line or a series of connected Lines:

Each segment in a series of connected Lines is a separate entity. You can also use the Line command to append Lines to existing Lines or Arcs.
To undo a line segment:
To close a Line drawing:
To append a line segment to an existing line or arc:
The appended continuation line attaches to the end of last Line or Arc that you drew.

Access
Command: Line
Menu: Draw > Line
Ribbon: Home > Draw > (Flyout) Line
Tool Palettes: Draw > Line