You can prevent your iPhone or iPad from auto-locking while using Documents. It’s handy when you’re reading a PDF book for a long time without performing any actions on the screen.
How to prevent the iPhone from automatically sleeping:
- Open a PDF file and tap the More ... icon at the top right.
- Tap View Settings
. - Enable the Keep iPhone Awake toggle.
How to prevent the iPad from automatically sleeping:
- Open any PDF file.
- Tap
at the top right. - Enable the Keep iPad Awake toggle.