                             Plot Function Menu


       Once a plot has been drawn on the monitor, the special plot functions
    are enabled through the following keys:


     F1...Turn measurement line cursor ON/OFF
          When the measurement cursor is on, the following keys are active:
           <-...Move cursor left
           ->...Move cursor right
            p...Print upper and lower plot values for date marked by cursor
     F3...Smooth upper plot
     F4...Smooth lower plot
     F5...Replace upper plot with user specified rate of change
          (After pressing F5, type rate of change period in days and
           press "ENTER")
     F6...Replace lower plot with user specified rate of change
     F7...Redraw original upper plot
     F8...Redraw original lower plot
     F9...Grid ON/OFF
    F10...User line draw mode ON/OFF
    Esc...Return to the main menu
