The forward /reverse switch is designed according to ergonomics allowing the one-handed operation.

反转切换开关符合人机工程尺寸，可以单手切换操作。

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Facebook has made clear that users can reverse the switch and restore their previously listed email as a default address.

WSJ: Facebook's Email Change Riles Users

When the car is put into reverse, the GPS navigator will switch from map to rear-view mode, enabling drivers to view what is below the rear window.

ENGADGET: Wireless Back-Up Camera for the Magellan RoadMate checks your six

When the vehicle is in reverse-mode, the SmartGPS will automatically switch from navigation mode to become a rear-view monitor that allows the driver to see what is behind the vehicle including children, pets and toys, or for assistance when parking into a tight parking space.

ENGADGET: Magellan's smartGPS navigator has built-in Yelp reviews, syncs with your phone (video)