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MouseAnnotation[]

gives any mouse annotation associated with the expression at the current mouse position.

Details
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Examples  
Basic Examples  
Scope  
Applications  
Properties & Relations  
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MouseAnnotation

MouseAnnotation[]

gives any mouse annotation associated with the expression at the current mouse position.

Details

  • MouseAnnotation[] returns Null if there is no mouse annotation associated with the expression at the current mouse position.
  • MouseAnnotation[def] returns def if there is no current annotation.
  • MouseAnnotation[] yields the mouse annotation associated with the expression that would be selected if the mouse were clicked.
  • The annotation is the expression note in Annotation[expr,note,"Mouse"].
  • Dynamic[MouseAnnotation[]] gives the continually updated current mouse annotation.

Examples

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Basic Examples  (2)

If the mouse is over the graphics, MouseAnnotation will return the associated annotation:

Wolfram Language code: Annotation[Graphics[Disk[]], "An annotation", "Mouse"]

When the mouse is over the graphics, the annotation is displayed:

Wolfram Language code: Dynamic[MouseAnnotation[]]

Use in plots:

Wolfram Language code: Plot[{Annotation[Sin[x], "Sine", "Mouse"], Annotation[Cos[x], "Cosine", "Mouse"]}, {x, 0, 2π}, PlotStyle -> Thick]
Wolfram Language code: Dynamic[MouseAnnotation[]]

Scope  (1)

Specify a custom value when there is no current annotation:

Wolfram Language code: {Annotation["one", 1, "Mouse"], Dynamic[MouseAnnotation[0]]}

Applications  (1)

Use MouseAnnotation to update the state associated with each graphic:

Wolfram Language code: DynamicModule[{x = {0, 0, 0}}, EventHandler[{Annotation[Graphics[{Red, Disk[]}, PlotLabel -> Dynamic[x[[1]]]], 1, "Mouse"], Annotation[Graphics[{Green, Disk[]}, PlotLabel -> Dynamic[x[[2]]]], 2, "Mouse"], Annotation[Graphics[{Blue, Disk[]}, PlotLabel -> Dynamic[x[[3]]]], 3, "Mouse"]}, {"MouseClicked" :> (x[[MouseAnnotation[]]] = x[[MouseAnnotation[]]] + 1)}]]

Properties & Relations  (3)

MouseAnnotation reveals annotations stored in other expressions:

Wolfram Language code: Annotation["xxx", "Label", "Mouse"]
Wolfram Language code: Dynamic[MouseAnnotation[]]

Tooltip presents the annotated information in a popup box:

Wolfram Language code: Tooltip[x + y, label]

Mouseover presents the annotated information by changing the displayed form:

Wolfram Language code: Mouseover[x + y, label]
Wolfram Research (2007), MouseAnnotation, Wolfram Language function, https://reference.wolfram.com/language/ref/MouseAnnotation.html.

Text

Wolfram Research (2007), MouseAnnotation, Wolfram Language function, https://reference.wolfram.com/language/ref/MouseAnnotation.html.

CMS

Wolfram Language. 2007. "MouseAnnotation." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/MouseAnnotation.html.

APA

Wolfram Language. (2007). MouseAnnotation. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/MouseAnnotation.html

BibTeX

@misc{reference.wolfram_2026_mouseannotation, author="Wolfram Research", title="{MouseAnnotation}", year="2007", howpublished="\url{https://reference.wolfram.com/language/ref/MouseAnnotation.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_mouseannotation, organization={Wolfram Research}, title={MouseAnnotation}, year={2007}, url={https://reference.wolfram.com/language/ref/MouseAnnotation.html}, note=[Accessed: 12-June-2026]}