LG Optimus F5 Owner's Manual page 79

While viewing a message, swipe the screen left and right to scroll through
all of your messages and use the following icons:
Archive
folder.
Delete
Labels
organize your messages.
Unread
Touch this icon to send the message to your archive
Touch this icon to delete the message.
Touch this icon to set labels for the message to help
Touch this icon to return the message to an unread state.
Communication
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