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  This table allows the user to choose phase space distributions to be
filled during the Monte Carlo session and then displayed.
  The distribution variable must be described in the first column. It is 
defined by a key character and a particle set following this character. 
For example, "C13" means cosine of the angle between first and third 
particles.
  The following key characters are available:
  A  - Angle in degrees;
  C  - Cosine of angle;   
  J  - Jet cone angle;    
  E  - Energy of the particle set;
  M  - Mass of the the particle set; 
  P  - Cosine in the rest frame of particles; 
  T  - Transverse momentum P_t of the particle set; 
  S  - Squared mass;
  Y  - Rapidity of the particle set;
  U  - user defined function. 
See the Manual for details.
  The second and the third columns are used to define the range of a
distribution. 
  For the C-version of CompHEP the ranges can be described by an algebraic
formula which contains numbers and CompHEP identifiers. To define a range 
of an 'S'-type variable the user must input a value V in GeV which will be 
transformed to V*abs(V). For example, to set the s13 cut
s13=(p1-p3)^2= -100 GeV^2, type -100 in the column "Max bound".

