By Corey Sandler

Your nifty Tab 4 NOOK has a setting called Airplane Mode. It disables Wi-Fi and Bluetooth radios but lets you read eBooks and play videos and music.

Little by little, the airlines and government agencies have been relaxing most regulations requiring passengers to turn off electronic devices. In fact, some airlines have begun offering Wi-Fi broadcasts of in-flight movies that can be viewed on tablets, laptops, and phones.

Although many scientists and some pilots say it’s much ado about nothing, most airlines require passengers to turn off all electronic devices during takeoff and landing. The theory was that all of these devices — and by now nearly every passenger has a phone and a tablet and the annoying kid who sits across the row on a 12-hour transatlantic flight has a radio-controlled robot — could possibly interfere with an airplane’s essential navigational and control systems.

Here’s how to turn Airplane mode on and off:

  1. With two fingers slightly separated, swipe down from the top of the screen.

    The Quick Panel, a set of shortcuts, appears.

  2. Tap the Airplane Mode icon to turn it on or off.

    When the feature is on, the airplane icon appears green.