Enable user to over-ride auto settings and move onto next slide at any time by clicking when in slideshow mode

The Slide Settings can be changed for any slide. In the Slide Settings window | General tab, you can select the "Advance: Manually (control with keyboard or mouse)" option (the default one is "Advance: Automatically after"). Click the "Mouse Click Actions" button on the Project Settings window | Advanced tab to change the default mouse button actions.