This setting is disabled to ensure that the screen never goes to sleep.
1. Go into your iPad’s Settings via the icon that looks like gears turning.
2. Next, choose Display & Brightness from the left-side menu.
3. Open the Auto-Lock settings by tapping on the Auto-Lock option.
4. Tap on Never.
Other Steps
To best configure the iPad for use as a Kiosk, we recommend you also:
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