LG L45C User Manual page 77

OR
# While viewing a list of labeled conversations, press the Menu Key
and touch More > Go to inbox.
To switch accounts
Gmail displays conversations and messages from one Google Account at
a time. If you have more than one account, you can open the Accounts
screen to view how many unread messages you have in each account and
to switch accounts.
1. From your Gmail Inbox, press the Menu Key
2. Touch the account that contains the email you want to read.
Reading Your Messages
While viewing a list of conversations in your Inbox or in any list of labeled
conversations, you can open a conversation to read its messages.
To read a message
# Touch a conversation that contains the message you want to read.
A conversation opens to the first new (unread) message, or to the
first starred message, if you've previously starred a message in the
conversation.
Communication
and touch Accounts.