The old way to draw a line:
1.Put something in the end point.
2.Zoom in the begin point.
3.Press Shift and drag a line from the begin point.
4.Find the end point and shake your hand. Now you has to find the end point again.
5.Drop your mouse.
The new way to draw a line:
1.Zoom in the begin point.
2.Use second zoom window in the end point.
3.Drag a line from the first window to the second window.
4.Have a cake.Don't go offtopic!