\environment math-fonts-helpers

\startbuffer[italic-1]
    $\showglyphs \showfontitalics V^1_2 + V^1 + V_2$
    \blank
    $\showglyphs \showfontitalics f^1_2 + g^1_2 + v^1_2 + w^1_2$
    \blank
    $\showglyphs \showfontitalics A^1_2 + B^1_2 + V^1_2 + W^1_2$
    \blank
\stopbuffer

\startbuffer[italic-2]
    \mathfontcontrol \italicshapekernmathcontrolcode
    \mathcontrolmode \plusone
    \getbuffer[italic-1]%
\stopbuffer

% \continueifinputfile{italics-002}

\starttext

    \MathSamples [
    ] [
        italic-1,
        italic-2
    ]

\stoptext