Use the Line Segment tool when you want to draw one straight line segment at a time. For a video on using the Line Segment tool, see www.adobe.com/go/vid0036. Select the Line Segment tool.Do one of the following: Position the pointer where you want the line to begin, and drag to where you want the line to end.Click where you want the line to begin, and specify the length and angle of the line.se the Line Segment tool when you want to draw one straight line segment at a time. For a video on using the Line Segment tool, see www.adobe.com/go/vid0036. Select the Line Segment tool.