6CYANA: distances vdw - CYANA command

Parameters: first=<string>                 (required)
            second=<string>                (required)
            limit=<real>                   (default: -1.0)
            increment=<real>               (default: 0.0)
            levels=<integer range>         (default: -99999..99999)

This command sets or modifies the lower distance limits for the
steric repulsion between atoms matched by the selections 'first'
and 'second' if their residue index difference is within the range
given by the parameter 'levels'. The lower distance bound is set to
the value of the parameter 'limit', if present, or increased by the
amount specified by the parameter 'increment'.
