DisplayFunction

is an option for graphics and sound functions that specifies a function to apply to graphics and sound objects before returning them.

Details

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.

Examples

Display a graphic in PopupWindow when clicked:

Wolfram Language code: Show[Graphics[{Pink, Rectangle[]}], DisplayFunction -> (PopupWindow[Button["Click here"], #]&)]

Display a graphic in a new notebook:

Wolfram Language code: Show[Graphics[{Pink, Rectangle[]}], DisplayFunction -> CreateDocument]

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