Want to automate all of the slides in PowerPoint 2010 or 2007? Here’s how.
1. Click Home then click somewhere in the left Slides pane.
2. Hold down Ctrl and press the A key. All of the slides should show as highlighted on in the pane.
3. Click the Animations tab. Over to the left you can select Automatically After and set time you wish to display each slide.
Now your slides should change to the next one automatically.