\rlap - LaTeX layout command

\rlap{ab}

Renderer support

Package	MathJax	KaTeX	XeTeX
`base`	MathJax: Full	KaTeX: Full	XeTeX: Full
`textmacros`	MathJax: Full	KaTeX: Full	XeTeX: Full

Syntax#

\rlapm{a}math content

Argspec m — one mandatory argument. In base. Reading argspecs

\rlapm:T{a}text content

Argspec m:T — one mandatory argument. In textmacros. Reading argspecs

textmacros

\text{\rlap{a}}

Package	Signature	Allowed mode	Notes
`base`	`m`	math	Used to place material flush-right in zero width so it overlaps neighboring math without contributing horizontal width, typically for manual annotations or adjusted symbol placement.
`textmacros`	`m:T`	text	Used in text-mode material to place content in a zero-width box that protrudes to the right, so it overlaps surrounding text without taking horizontal space.

TeXForm parses this entry as prefix syntax; the package determines its argument specification.

`base`
Input	Case	MathJax	KaTeX	XeTeX
`\rlap{a}`	Positive · baseline	Pass	Pass	Pass
`\rlap a`	Positive · bare[0]	Pass	Pass	Pass

`textmacros`
Input	Case	MathJax	KaTeX	XeTeX
`\rlap{a}`	Positive · baseline	Pass	Pass	Pass
`\rlap a`	Positive · bare[0]	Pass	Pass	Pass
`\rlap{a^2}`	Negative · neg:T[0]	Fail	Fail	Fail