MLIST /COLUMNS

        MRTCAL\MLIST [IN|OUT] /COLUMNS [Attr1 Attr2 ... AttrN]

    MLIST  /COLUMNS  allows  to customize the columns displayed. They can be
    repeated as many time as desire. Valid values are:
        - NUMBER
        - VERSION
        - DIRECTORY
        - FITSFILE
        - MRTFILE  (the index file)
        - RECORD  (position in MRT index file)
        - WORD  (position in MRT in record)
        - TELESCOPE
        - PROJID
        - SOURCE
        - OBSERVED
        - UT
        - LST
        - AZIMUTH
        - ELEVATION
        - FRONTEND
        - SCAN
        - BACKEND
        - OBSTYPE
        - SWITCHMODE
        - COMPLETE
        - CALIBRATED
        - ITIME (last indexation time)