This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


Underscript[x, y]
is an object that formats as .
  • In a notebook, an underscript can be created using Ctrl+Plus. Ctrl+Space moves out of the underscript position.
  • Input of the form in a notebook is interpreted as Underscript[x, y].
  • The baseline of Underscript[x, y] is taken to be the baseline of x.
  • Underscript[x, y] is usually output with y in a smaller font than x.
New in 6