Reset kiosk mode on inactivity
In the earlier PowerPoint versions, when you set your presentation to run in kiosk mode (Slide show > Set up Show > Kiosk mode), your slide show will automatically reset and goes back to the first slide after a period of inactivity (approx. 5 mins). This feature however, vanishes in the later versions. If you need a kiosk mode reset, you will have to do it manually. But how?
Since you have set your presentation to run as a kiosk mode, ensure that you have already created navigation buttons in the slide master to advance back and forth the slides. Now, go to View > Master > Slide Master. We can put
invisible linking technique into good use.
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First, draw a rectangle that covers the entire slide master.
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Double click on the rectangle, set fill color to 99%. Line color to no line.
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Click Ok.
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Right click on the invisible autoshape, select Action Settings.
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Select Mouse Over tab, set it Hyperlink to the Slide 1.
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To make the mouse over work, Click Add Effect > Entrance > Appear.
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Set the Start from "On Click" to "After Previous".
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Double click on the added effect.
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Select Timing tab, set the delay to lets say 60 seconds (equiv to 1 min) or a time of your preference.
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Click Ok.
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Close Master view once you are done. Now, the invisible linking (kiosk reset) will apply to the entire presentation.