%\setupbodyfont[dejavu]

\starttext

    \ifcase\contextlmtxmode

        \definemetafont[demo-symbols][demo-symbols.mp]

        \startbuffer
            watch this: {\demo\char"261A} \quad  \ruledhbox{\demo\char"261A}
        \stopbuffer

        \definefont[demo][demo@demo-symbols]

        \getbuffer \blank

        \definefont[demo][demo@demo-symbols at \the\dimexpr3\exheight]

        \getbuffer \blank

        \definefont[demo][demo@demo-symbols at \the\dimexpr4\exheight]

        \getbuffer \blank

    \else

        \showglyphs

        \startTEXpage[offset=10pt]
            \definemetafont[MyDemoA][demo-symbols][at 10pt]\MyDemoA\char9754
            \definemetafont[MyDemoB][demo-symbols][at 30pt]\MyDemoB\char9754
        \stopTEXpage

    \fi

\stoptext