Buttons can be added into a slide using the menu bar option 'Slide Show -> Action Buttons'. All these
buttons work on two events 'Mouse Over' and 'Mouse Click' event. The action can be None, Hyperlink to, run a program, macro.
Even sounds can be played when the button is clicked by a mouse or hovered over by a mouse. Using Action Buttons in Microsoft Powerpoint 2002
In the above example, next and previous button are added to the slides.
On a mouse click event an hyperlink is added to the next or previous slide.
Test the new Action buttons by running the slide show and clicking it.