ok, what is the icon on my text msg screen?  it's the third from the left on the top of the screen.  it is a black circle with a downward and toward the left arrow.  it wasn't there the other day, and now it won't go away.  also, how can you toggle the recieved texts between the 1 and 2 line option?  I appreciate any help on this matter.  ¡Gracias!