% \nopdfcompression

\setupinteraction[state=start]

\definesymbol[one]  [1]
\definesymbol[two]  [2]
\definesymbol[three][3]

\definefieldstack[some][one,two,three]

\defineoverlay[some][\overlaybutton{Walk{some}}]

\starttext

\startTEXpage
    \framed[background={foreground,some}]{\fieldstack[some]}
\stopTEXpage

\stoptext

