To navigate through your presentation using the keyboard or your mouse:
You can navigate through your presentation using either your keyboard or your mouse, or both. To advance to the next slide in your presentation, click the left mouse button or press the Enter key. To return to the previous slide in the presentation, right-click and select Previous, or press the Backspace key. At any time you can exit your presentation by pressing the Esc key or right-clicking and selecting End Show.