If arguments are given, outputs the title of each arguments, otherwise outputs the title of the active window and continue to output it as it changes if the snoop mode is on.

xtitle [-h|-v|-s|-f FORMAT] [WID ...]

• -h — Print the synopsis to standard output and exit.
• -v — Print the version to standard output and exit.
• -s — Activate the snoop mode.
• -f FORMAT — Use the given printf format.