An action button works just like a hyperlink. The cool thing about Action Buttons is they are typically in recognizable shapes like arrows.
In this way, you can create one arrow that moves a user to the previous slide and another arrow that moves a user to the next slide.
Action buttons make a presentation extraordinarily easy for even a PowerPoint novice to navigate. They work particularly well on training presentations or on presentations left unattended at kiosks.
Inserting an Action Button
Click the Shapes command in the Illustrations group on the Insert tab
Under Action Buttons, choose a shape
Draw the shape on your slide (click and drag)
Figure 72. Reference Settings Dialog Box
4. Choose Hyperlink to
Figure 73. Hyperlink to Slide Dialog Box
5. Select a Slide
6. Click OK
7. Click OK