ReadonlychildrenThe math
Optional ReadonlydepthWhether it takes up its depth below the line. False gives it none (m:zeroDesc), as LaTeX's \hphantom and
\smash.
Optional ReadonlyheightWhether it takes up its height above the line. False gives it none (m:zeroAsc), as LaTeX's \hphantom and
\smash.
Optional ReadonlyvisibleWhether the math is seen (m:show).
Optional ReadonlywidthWhether it takes up its width. False gives it none (m:zeroWid), as LaTeX's \vphantom.
Options for MathPhantom.