Normally, the screen will sleep or turn off after a certain amount of time when your device sits idle for a while. This can bring disruption that you always need to unlock the screen to work with your device. However, TechEDMentor enables you to bypass the time limit with the Keep iPhone/iPad Awake function.
1. Go to Documents 
and open a PDF file as needed to enter the reading page;
2. Click 
in the top menu bar;
3. Tap on the Keep iPhone/iPad Awake toggle to turn on this function.
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