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


is an option for cells and notebooks which specifies how long in seconds a delimiter should flash when its matching delimiter is entered.
  • DelimiterFlashTime->0 makes delimiters not flash.
  • A typical default setting is DelimiterFlashTime->0.3, which makes matching delimiters flash for 0.3 seconds.
  • Delimiters include parentheses, brackets and braces, as well as [[, ]] and (* and *), and paired special characters such as , .
  • If you enter an unpaired closing delimiter the standard Mathematica front end will beep.
  • You can use the front end menu item Check Balance to select ranges with balanced delimiters in an expression.
  • You can set DelimiterFlashTime at the level of a single cell, a notebook, or the whole front end.
Create a cell in which matching delimiters are highlighted for two seconds:
Click for copyable input
Click for copyable input
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