<context>
\setuplayout[scale=0.8,width=8cm]
Examples:
\placeformula{a}
<context>
\setuplayout[scale=0.8,width=8cm]
More examples:
\placeformula{c}
<context>
\setuplayout[scale=0.8,width=8cm]
Yet more examples:
\placeformula
<context>
\setuplayout[scale=0.8,width=8cm]
More examples for left-located equation number:
\setupformulas[location=left]