LG LS855 - Manual (Page 112)

Accounts and Messaging 102
3. Tap the contact name to open that message.
When reading a message or when its tab is selected, you can tap > Mark unread to return
a read message to the unread state. For example, to remind yourself to read it again later.
Composing and Sending a Message
You can compose and send a message to people or groups with Gmail addresses or other
email addresses.
To compose and send a message:
1. Tap > > Gmail.
2. Tap > Compose.