^ General principles: 
  GraphPAD is fairly self-explanatory. It is not essential to read the manual.
  Unlike many programs, GraphPAD does not create the entire graph on the
  screen and then `dump' it onto the plotter. Instead you create the graph
  step by step on the plotter. To plot several data sets or several curves
  on one graph, you must enter and plot one at a time.
^ Selections: 
  -Select a suggested answer [enclosed in brackets] by pressing RETURN.
  -Answer a multiple-choice question (the first letter of each choice is high-
   lighted) by typing one of those letters. Do not press RETURN afterwards.
  -Choose from a menu (list) either by moving the pointer with , , HOME,
   or END, then pressing RETURN; or by typing a highlighted letter (no RETURN).
^ Special keys: (Located at upper left of keyboard.)
  -F1:  Return to the main menu. 
  -F2:  Go back to the previous question.
  -ESC: Exit a menu, or interrupt a plot in progress.
^ Limitations: 
  -No more than 255 data points or 250 points of curve resolution.
  -No more than 5 replicate Y values per data point.
^ Priority of the selections on the Main Menu: 
  -Essential: Input, Graph.
  -Useful: View, Edit, Write, Files, Options, Average.
  -Special purpose: Curve, Digitize, Key, Lines, Print, Regression, Transform.
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       Press RETURN (─┘) to go to the main menu.