LimitsPositioning is an option for UnderoverscriptBox and related boxes which specifies whether to change the positioning of underscripts and overscripts in the way conventional for limits.
UnderoverscriptBox[x, y, z, LimitsPositioning->False] is always displayed with explicit underscripts and overscripts, as .
UnderoverscriptBox[x, y, z, LimitsPositioning->True] is displayed as when large, and when small.
The form is used when the box appears in a subscript or other script, or inline in a piece of text.
With the default setting LimitsPositioning->Automatic the display of UnderoverscriptBox[x, y, z] depends on x. If x is \[Sum], \[Product] or another form conventionally displayed with limits, then LimitsPositioning->True is effectively used. Otherwise, LimitsPositioning->False is used.
LimitsPositioningTokens is a Cell option which can be set to a list of forms for which LimitsPositioning->True should be used.
See Section 2.9.11.
See also: ScriptSizeMultipliers.
New in Version 3.