BUILT-IN MATHEMATICA SYMBOL
OverscriptBox
OverscriptBox[x, y]
is the low-level box representation for 
in notebook expressions.
- 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[x, y] 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[x, y] is interpreted on input as Overscript[x, y].
- The following special interpretations are made:
-
- For these special cases special input forms such as x\&_ can be used.
- The baseline of OverscriptBox[x, y] is taken to be the baseline of x.
- OverscriptBox[x, y] 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.
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]= |  |
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