This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)


is an option for cells that specifies an expression to be dynamically updated whenever the cell is visible on-screen.
  • CellDynamicExpression->Dynamic[expr] causes the expression to be tracked and updated in the usual way, except that expr is not displayed anywhere.
  • CellDynamicExpression may not trigger dynamic updates if the cell is scrolled off-screen or inside of a closed cell group.
New in 8