Option 1 - Device setting

  1. Launch the Settings app on your iPhone or iPad.
  2. Tap on General.
  3. Now choose the Auto-Lock option.
  4. Tap on Never.

NOTE: After a presentation the screen lock can be enabled again.

Option 2 - nextINTERACT setting

If you use nextINTERACT for presentation, you can disable device screen lock by following these steps.

  1. Launch nextINTERACT
  2. Tap on [Settings] in nextINTERACT
  3. Tap on [Assistive Features], then enable Standby mode
  4. This will prevent nextINTERACT, as well as the device to lock the screen.