the extent. This takes precedence over the @code{text-pointer-glyph}
and @code{nontext-pointer-glyph} variables. If for any reason this
glyph is an invalid pointer, the standard glyphs will be used as
-fallbacks. @xref{Mouse Pointer}
+fallbacks. @xref{Mouse Pointer}.
@item detachable
(Boolean) Whether this extent becomes detached when all of the text it