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Mathematica > Notebooks and Documents > Low-Level Notebook Programming > Low-Level Notebook Structure > OverscriptBox >

BUILT-IN MATHEMATICA SYMBOL

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OverscriptBox

is the low-level box representation for

in notebook expressions.

MORE INFORMATION

OverscriptBox is the low-level representation of Overscript. Except for low-level notebook expression manipulation, OverscriptBox should not need to be used directly.

Inside OverscriptBox can be input as .

In a notebook, an OverscriptBox can be created using Ctrl+7 or Ctrl+&. Ctrl+Space moves out of the overscript position.

In StandardForm, OverscriptBox is interpreted on input as Overscript.

The following special interpretations are made:

	OverscriptBox[x,"_"]	OverBar[x]
	OverscriptBox[x,""]	OverVector[x]
	OverscriptBox[x,"~"]	OverTilde[x]
	OverscriptBox[x,"^"]	OverHat[x]
	OverscriptBox[x,"."]	OverDot[x]

For these special cases special input forms such as x\&_ can be used.

The baseline of OverscriptBox is taken to be the baseline of x.

OverscriptBox is usually output with y in a smaller font than x.

With the option setting LimitsPositioning->True, y is placed in an overscript position when the whole OverscriptBox is displayed large, and in a superscript position when it is displayed smaller.

In StandardForm, explicit OverscriptBox objects are output literally. You can use DisplayForm to see the display form of such objects.

Basic Examples (3)

Display a letter with an overscript:

An OverscriptBox form is typically interpreted as an Overscript expression:

The standard formatting for Overscript uses OverscriptBox:

The formatted result looks like this:

Display a letter with an overscript:

Out[1]//DisplayForm=

An OverscriptBox form is typically interpreted as an Overscript expression:

Out[1]=

Out[2]//FullForm=

The standard formatting for Overscript uses OverscriptBox:

Out[1]//FullForm=

The formatted result looks like this:

Out[2]=

Overscript UnderscriptBox UnderoverscriptBox SuperscriptBox GridBox FractionBox ScriptSizeMultipliers PlotLabel

Representing Textual Forms by Boxes

String Representation of Boxes

Typing Overscripts

Low-Level Notebook Structure

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