  ?        Help         Prints out this HELP text.
 
  0       0 key returns to main menu
  
  X       x-position    Prints out x-position of cursor.
  
  Y       y-position    Prints out y-position of cursor.
  
  P       centroid      Prints out centroid like fit to peak at cursor
                         x-position and adds peak to  root.spc file.
  
  -       delete        Deletes peaks by number from *.spc file.
                        Enter peaks by number 1,4,9,11,etc

  A       integral      Prints out highest point, height, integral,
                         integral width, centroid of peak.  Peak is
                         defined with 2 cursor inputs - one on each
                         side of peak.
   
  C       integral      Same function as "A" above, but integrates 
                         above zero.

  
  E       expand        Expands box designated by cursor inputs --
                         one at lower left corner and one at upper
                         right corner.
  
  R       refresh       Replots the entire spectrum.
  
  #       refresh       Replots the spectrum as it had been displayed.
  
  O       label x       Writes the x-position of the cursor on the plot.
  
  M       x,y           Actual x and y position of the cursor.
  
  L       lambda        Wavelength of cursor position. (XRF only)
  
  S      semilog        Toggles y-axis to semilog display and back.
  
  I      integral       Toggles y-axis to integral display and back.
  
  Q      square root    Toggles y-axis to square root display and back.
  
  N      normalize      Toggles y-axis to 0-100 display and back.


  
  1    1st derivative   Displays first derivative of spectrum.
  
  2    2nd derivative   Displays second derivative of spectrum.
   
  K    K,L,M markers    Displays elemental line markers. (XRF only)
                         Requests symbol,(optional)order for element
                         to be displayed.
  
  W    x-axis           Toggles x-axis display between 2-theta and
                        wavelength.
   
  F   peaks file        Display peaks found  .SPC file.

  G   peaks file        Same as F but filename is requested.
  
  T     text            Allows text to be written on plot starting at
                         cursor position.





  B   poly background   User will supply bkgr positions using the B
                        command. When all positions are entered a
                        ' ' is used to terminate. The bkgr will be
                        drawn and then the cursor appears; if a Y is
                        entered the bkgr is accepted; any other key
                        will give the option to reenter using B command
                        or any other valid cursor command

  D   d spaceing	Returns dspace of cursor for DIF data

  J   JCPDS		JCPDS pdf#(file,card) input to plot d&I

  H  Hardcopy to lp
