is an option for graphics and sound functions that specifies a function to apply to graphics and sound objects before returning them.
- The typical default setting is DisplayFunction:>$DisplayFunction.
- With a notebook front end, $DisplayFunction is normally Identity.
- DisplayFunction->(Print[#];&) prints the graphic in a separate cell.
- Show, as well as functions like Plot and Plot3D, automatically applies the function specified by the setting for DisplayFunction before returning its results.
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