Several fonts have been declared. Those include
\titlefont(large sans serif),\ttitlefont(large typewriter),\SC(small caps),\Csc(Caps/small caps), and\tentex(TeX's extended character set).
For illustrations and further details, see fwebmac.web.
To typeset a string of characters in typewriter type, one may use the
\. macro. (More precisely, the name of this macro is the value
of the style-file parameter format.typewriter. For more
information, see S_format.)
When using this, one must escape the special
characters \#%$^_{}~&, as in \.{\\alpha}. (FWEAVE
does that escaping automatically when typesetting strings in code mode.)
You may wish to surround \.{...} with an \hbox; that is
not done by default because FWEAVE uses special trickery to break
long strings in code mode automatically, and that breaking would be
inhibited by an \hbox.