Select the rectangular picture box you want to make into a button.
In the HTML5 palette, click Button .
Actions added to a button
Optionally, enter an internal name for the picture in the Name field. This name displays in the Interactive Objects area in the bottom of the palette.
If you want the button to be initially invisible, check Initially Hidden .
To add an action for the button, click the button. Choose an action from the Action drop-down menu at the bottom, then use the controls below to configure the action. You can add multiple actions to the same button. For more information, see " Working with interactivity actions ."
To finish configuring the button, click a different object or a blank part of the layout.