\usemodule[present-grow]

\def\SomeSymbol#1#2{\definedfont[ContextNavigation at #1]\fontcharbyindex{#2}}

\setupcombinations[distance=\FrameOffset,inbetween=\vskip\FrameOffset]

\starttext

\TitlePage{Some Famous Symbols}

\Topic{Symbols}

\StartSample
  \startcombination[2*2]
    {\SomeSymbol{5cm}{1}} {}
    {\SomeSymbol{5cm}{3}} {}
    {\SomeSymbol{5cm}{2}} {}
    {\SomeSymbol{5cm}{4}} {}
  \stopcombination
\StopSample

\Topic{Previous}

\StartIdea
  \StartSample
    \SomeSymbol{7cm}{1}
  \StopSample
  \StartText
    This symbol can be used to indicate a hyperlink to a
    previous page.
  \StopText
\StopIdea

\StartIdea
  \StartSubText
    As one can expect there is also a symbol for going to
    the next page.
  \StopSubText
\StopIdea

\Topic{Previous}

\StartIdea
  \StartSample
    \SomeSymbol{9cm}{2}
  \StopSample
  \StartText
     This symbol is actually just a mirrored version of the
     first symbol we showed.
  \StopText
\StopIdea

\NoTopic

\StartText
  Is this nice or not?
\StopText

\Topic{First and Last}

\StartSample
  \SomeSymbol{11cm}{3}
\StopSample

\StartSample
  \SomeSymbol{11cm}{4}
\StopSample

\StartIdea
  \StartSample
    \SomeSymbol{5cm}{3}
  \StopSample
  \StartText
    A few screens back, we saw this symbol.
  \StopText
\StopIdea

\StartIdea
  \StartSubText
    This symbol represents the beginning of something.
  \StopSubText
\StopIdea

\StartIdea
  \StartSample
    \SomeSymbol{5cm}{4}
  \StopSample
  \StartSubText
    Just like this one represents an end.
  \StopSubText
\StopIdea

\StartIdea
  \StartSubText
    They look just like the symbols found on audio and
    video players.
  \StopSubText
\StopIdea

\Topic{Summary}

\StartIdea
  \StartSample
    \SomeSymbol{6cm}{1}
  \StopSample
  \StartText
    So we have a symbol for previous \unknown
  \StopText
\StopIdea

\StartIdea
  \StartSample
    \SomeSymbol{6cm}{2}
  \StopSample
  \StartSubText
    \unknown\ and one for next \unknown
  \StopSubText
\StopIdea

\StartIdea
  \StartSample
    \SomeSymbol{6cm}{3}
  \StopSample
  \StartSubText
    \unknown\ and yet another for first \unknown
  \StopSubText
\StopIdea

\StartIdea
  \StartSample
    \SomeSymbol{6cm}{4}
  \StopSample
  \StartSubText
    \unknown\ and of course for last.
  \StopSubText
\StopIdea

\stoptext