This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


represents an object that displays as over when the mouse pointer is over it, and as expr otherwise.
  • Mouseover can be used with graphics or any other expression.
  • The following options can be given:
Alignment{Left,Top}how to align objects in the display area
ImageSizeAutomaticthe overall image size for the displayed objects
Change from to when the mouse is over the expression:
Change from to when the mouse is over the expression:
Click for copyable input
Use anywhere in a formula:
Use anywhere in a graphic:
ImageSize->All keeps the overall size constant regardless of which expression is visible:
Use Dynamic to recompute the tooltip every time it is looked at:
Align within Mouseover:
Change the background color:
Align with surrounding text:
Add margins to Mouseover:
Add margins to Mouseover:
Control the overall size of Mouseover:
Use Mouseover to find the rule number of a particular CellularAutomaton:
Mouseover changes the expression itself:
StatusArea presents the label in the status area:
Tooltip presents the label in a popup box:
If the mouseover is smaller than the original object, there can be an oscillation:
With ImageSize->All space is always left for the largest object:
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