Facebook for iPhone: Navigating the Facebook App

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Once you log into the Facebook app, you will see your News Feed.
In the white toolbar below the search bar, you can update your Status, share a Photo, or Check In at a location by tapping the associated icon.
Tap Search at the top of the screen to search for specific people, groups, or organizations.
In the bottom toolbar to the right of News Feed, you can access Friend Requests, Messages, Notifications, or More by tapping the associated icon.
To return to your News Feed, tap the icon in the bottom left corner of the screen.