SupSub

Attach superscripts, subscripts, or operator limits to one math operand. Placement uses the base's character nucleus and italic correction.

Property	Default	Meaning
children	Empty	Base operand: an element or TeX source.
sup / sub	Absent	Superscript and subscript operands.
limits	Base policy	Override with "auto", "always", "never", or a boolean.
style / size_index	Inherited	Base math style and optional TeX size index.
klass / left / right	Base classes	Reclassify the complete scripted atom.

Superscripts inherit crampedness; subscripts are always cramped. Nesting reaches script and then scriptscript size, where it stops shrinking. A subscript starts at the base advance; a superscript also includes its italic correction.

MathOp supplies the default limit policy. Explicit \limits and \nolimits are preserved by the TeX adapter. See ordinary formulas for complete examples.