For redundancy in case of failure or for connecting them to different subnets.
Not always. If you have text wrapping on, it will snap to the text.
A quick way to restore the arrow pointer after you have used it for drawing is to press the esc key. The esc key is <span>used for any of the different </span>functions<span>, as to interrupt or cancel the current process or running program, or to close a pop-up window.</span>