RANGE

          REAL RANGE[2]

    Specify the range (in 3rd axis unit) of displayed channels. This provides  a
    facility  similar  to  FIRST and LAST variables, but in a more user-oriented
    unit.

    RANGE should not be confused with SPAN, which specifies the displayed veloc-
    ity range when one of the 2 first axis is of type Velocity, e.g.   for  SHOW
    PV