Name
setmetamode — Get or set keyboard meta mode
Synopsis
setmetamode  [ metabit  |   escprefix ]
Options
  Without argument, it shows the current meta key mode.
  metabit|meta|bit     The meta key sets the top bit of the character.
  escprefix|esc|prefix The meta key sends an escape prefix.
Other options:
  -h, --help           This text
  -V, --version        Print program version and exit
Description
setmetamode can be used to determine and set the
      key code sent by the meta (aka Alt) key.