In some presentations you may need to disable the left mouse click to prevent it advancing to the next slide. By default, PowerPoint will let you advance any slide by clicking the left mouse button or pressing Enter. We have a good and a bad news.
The good news is that you can effectively disable the left mouse click to prevent it advancing to the next slide. However, the Enter key cannot be disabled so easy.
To disable the left mouse click go to Transition menu in powerpoint 2010 and look for the Advance Slide checkbox On Mouse Click. Uncheck this option for the selected Slides. Make sure you have selected all the Slides in the left pane.
That’s all. Now when you click your left button in the mouse during a Slideshow, your presentation won’t advance any more.