# Hover Expressions

You may display additional information about a note when the cursor hovers over the note. The hover expression is only displayed in Maps and Outlines.

The attribute `HoverExpression` lets you specify the information that will be shown while hovering. A note may have its own HoverExpression, but often will inherit HoverExpression from a prototype.

To add or change the hover expression, open the Text inspector, and switch to the Hover pane

The HoverExpression attribute is simply an expression in action code, just as used in Tinderbox rules, container actions, and agent actions. If HoverExpression is empty, no hover expression is displayed.

For example:

> `$WordCount+" words"`

> --> 7500 words)

would display the current word count of the note, and

> `$WordCount+" words\n\n"+$Text`

would display the word count followed by an empty line, and then display the first lines of the note’s text.

For more information on actions and expressions, see Actions, Expressions, and Rules .