\startproduct test
\definefontfallback[pagellaarrows][texgyrepagella-math][arrows][check=yes,force=yes]
\definefontfallback[pagellaarrows][texgyrepagella-math][0x021AF][check=yes,force=yes]
\starttypescript[math][main]
\loadfontgoodies[lucida-typeone-math]
\definefontsynonym[MathRoman][lucidamath@lucida-math][fallbacks=pagellaarrows]
\stoptypescript
\starttypescript [main]
\definetypeface [main] [rm] [serif] [lucida] [default] [features=default]
\definetypeface [main] [ss] [sans] [lucida] [default] [features=default]
\definetypeface [main] [tt] [mono] [lucida] [default] [features=none]
\definetypeface [main] [hw] [handwriting] [lucida] [default] [features=default]
\definetypeface [main] [cg] [calligraphy] [lucida] [default] [features=default]
\definetypeface [main] [mm] [math] [main] [default]%[fallbacks=pagellaarrows]
\stoptypescript
\setupbodyfont[main,9pt]
$\downzigzagarrow,↯,\downarrow$
{\switchtobodyfont[pagella,10pt]↯}
\stopproduct