$ gemmi mtz -h
Usage:
 gemmi mtz [options] MTZ_FILE[...]
Print informations from an mtz file.
  -h, --help         Print usage and exit.
  -V, --version      Print version and exit.
  -v, --verbose      Verbose output.
  -H, --headers      Print raw headers, until the END record.
  -d, --dump         Print a subset of CCP4 mtzdmp informations.
  -B N, --batch=N    Print data from batch header N.
  -b, --batches      Print data from all batch headers.
  -A, --appendix     Print appended text.
  --tsv              Print all the data as tab-separated values.
  -s, --stats        Print column statistics (completeness, mean, etc).
  --histogram=LABEL  Print histogram of values in column LABEL.
  --cells            Print cell parameters only.
  --check-asu        Check if reflections are in conventional ASU.
  --compare=FILE     Compare two MTZ files.
  --toggle-endian    Toggle assumed endiannes (little <-> big).
  --no-isym          Do not apply symmetry from M/ISYM column.
  --update-reso      Recalculate resolution limits before printing.
