Drawing Lines on a Sketch Plane
- 
                                Click 
                                        Line in the Sketch group or press L.
                         - If a sketch plane is not active, click an object or objects in the Design window to make a sketch plane.
 - Click to set the first point of the line.
You can dimension the points relative to other objects.  - Continue selecting points to draw line segments.
If you want any section of the line to be an arc, right-click and select Switch to Arc, then click to set the radius. Right-click and select Switch to Line to return to drawing straight lines between points. You must create at least one line segment before using this option.  - End the line:
Double-click to set the end point of the line.
Right-click and select Finish Line.
Press Esc.
Connect the end point to the start point.
Click any tool (except the Clipboard and Orient tools).
 
Note: Click and drag to draw one straight line.