EXTRACT

        [DISPLAY\]EXTRACT VarName [blc1 blc2 blc3 trc1 trc2 trc3]

      Extract a subset of the image variable VarName and put it in the EXTRACTED
    image variable.

      Without argument, the region covered by the subset is defined by the SIZE,
    CENTER and RANGE values. In this case, the EXTRACTED variable dimensions are
    automatically derived from this values, and EXTRACTED can be bigger than the
    actual cube defined by VarName. Areas not covered by the initial VarName are
    filled out with the Blanking value of the VarName, or by  zeros  if  VarName
    has no blanking.

      If  the  arguments blc1 to trc3  are  specified, the subset corresponds to
    VarName[blc1:trc1,blc2:trc2,blc3:trc3] of the image  variable  VarName.  The
    BLCi and TRCi values must correspond to a valid subset.