Lap

A zero-advance ordinary atom that still draws its operand. Height, depth, and baseline remain intact. Strings parse as TeX.

Property	Default	Meaning
children	Empty	Overhanging operand.
align	"left"	Align the operand's left edge, center, or right edge to the insertion point.

align="left" places the operand after the insertion point (\mathrlap). align="right" places it before the point (\mathllap). align="center" centers it on the point (\mathclap). The default is "left".

Ink overhang is retained independently of the zero width. A lap does not move the following content backward; use negative MathSpacer advance for that. Combine with Smash to suppress both dimensions. Explicit SVG viewports need padding around overhanging ink.