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SET_YMAN()                                                         T_EXAM08
   Toggles the Y axis from automatic to manual scaling.

   Syntax
         nOnOrOff = SET_YMAN([nOnOrOff] [,nSide])

   Arguments
         OPTIONAL PARAMETERS
         nOnOrOff    Sets manual scaling on or off.
                     0 - OFF. [Default], 1 - on
         nSide       Left or right Y axis 1-left, 2-right

   Returns
         nOnOrOff    Returns whether manual scaling is on or off.
                     0 - automatic scaling.
                     1 - manual scaling.

   Description
         SET_YMAN() toggles the Y axis from automatic to manual scaling.
         Default is automatic. A 1 sets manual scaling ON, a 0 sets it OFF.
         When the PLOT() or PIE() functions are called, the automatic axis
         scaling routine calculates the high, low, and increment for the
         scale based on the high and low values of the data set. The high
         and low values for the data set can be modified with SET_YMAX() and
         SET_YMIN(). The automatic scaling will then use those values as the
         high and low for the data set. The automatic scaling will still
         modify the high, low, and increment values so all the datapoints
         will fall within the scale, and the scales will have evenly rounded
         numbers. You can override all automatic scaling by setting all
         three functions: SET_YMAX(), SET_YMIN() and SET_YINC(). The scale
         will match your values exactly.