ox -- toggle tab compression/expansion default range syntax . ox "ox" turns compression of tabs on or off. If a file has tabs in it, they will be expanded if compres- sion is on. Otherwise they will be left alone, and will show up as the default unprintable character. The message "XTABS" will be displayed in the status line if tab compression is on. Type "hdir" to go back to the general help directory. Type "ho" for help on the option command.