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Showing and hiding image buttons
In some cases, you may want the button area to be invisible until the pointer moves over
it. By alternately showing and hiding a button, you can create interesting visual effects in
a document. For example, when you move a pointer over a city on a map, a detail map of
the city could be displayed, and the detail map could disappear when the pointer moves
away from the city.
Showing and hiding icons A. Pointer not over button area B. Pointer enters button area C. Pointer
exits button area
To create a button that appears only during mouse rollover:
1. Using the Button tool , drag across the area where you want the pop-up button to
appear. For example, if the PDF file contains a map of France, drag across the area where
you want a detailed map of Paris to pop up.
2. Using the Button tool , double-click the button.
3. Click the Options tab, and choose Icon Only from the Layout menu.
4. Choose Push from the Behavior menu, and then choose Rollover from the State list.
5. Click Choose Icon, and then click Browse. Select the file type from the File Of Type
(Windows) or Show (Mac OS) menu, navigate to the location of the image file, and then
double-click the file. In this example, you would select a map of Paris. Click OK to accept
the previewed image as the button.
6. Click the Appearance tab. If needed, deselect Border Color and Fill Color, and then click
Close.
7. Select the Hand tool , and move the pointer across the button. The image field you
defined appears as the pointer rolls over the button area and disappears when it exits.
If you want the image to be larger than the rollover area, or if you want the image
to be in a different location than the image button that pops up, use the Show/Hide A Field
action. First, you specify an icon for the button that will be shown and hidden. Next, you
create a second button that acts as a hot spot when the mouse rolls over it. You do not
assign an icon for the appearance of the second button. Instead, you use the Actions tab to
show the first button when the pointer enters the second button, and hide the first button
when the pointer exits. (See
Using actions for special effects .)