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Back button
It goes back to the previous screen.
Home button
Press the Home button to return to the main screen from any
window.
Recent apps
Opens a list of thumbnail of apps you’ve worked with recently.
To open an app, tap on its thumbnail.
To remove an app from the list, tap on the X on the top right of
the thumbnail or swipe it left or right.
Favorites tray
The first row at the bottom of the screen just over the navigation buttons is the
Favorites
tray, in which you can find icons of the favorite apps. These icons
appear in all Home screens of the device.
At the center of the screen, immediately above the favorites bar, there is an
arrow icon pointing up (^). Touch this icon to open the
All apps
screen that
shows all applications installed on the device.
Note
: In some devices the favorites tray can be arranged vertically on the right
side of the screen when the device is oriented horizontally.
The app icons shown in the image may differ depending on the version of the
device.