The "fts-config" command:

Usage: fossil fts-config ?SUBCOMMAND? ?ARGUMENT?

The "fossil fts-config" command configures the full-text search capabilities
of the repository.  Subcommands:

    reindex            Rebuild the search index.  This is a no-op if
                       index search is disabled

    index (on|off)     Turn the search index on or off

    enable cdtwe       Enable various kinds of search. c=Check-ins,
                       d=Documents, t=Tickets, w=Wiki, e=Tech Notes.

    disable cdtwe      Disable various kinds of search

    stemmer (on|off)   Turn the Porter stemmer on or off for indexed
                       search.  (Unindexed search is never stemmed.)

The current search settings are displayed after any changes are applied.
Run this command with no arguments to simply see the settings.