The Line tool will draw a Two-Point Line in Trace.
Initial Position (Anchor)
Terminating Position (Anchor)
When drawing:
Left-Click sets the Point under the Cursor.
Right-Click Snaps to the nearest Point.
Hold down the CTRL key to draw in Ortho Mode; i.e., Horizontally/Vertically only.
After it is drawn, a Center point will be displayed, which can be moved to alter the line into an Arc.
Click to place the two points of the Line:
Start Point
End Point
The drawn Line displays a Center Point which can be used to turn the Line into an Arc.
Line Design Details
Drawing a Line: Draw Section: Trace
Changing a Line into an Arc: Draw Section: Trace