Google Android 2.3 User Manual page 140

Gmail
Switch accounts
Gmail displays conversations, messages, and settings 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.
Adding and configuring accounts is described in "Accounts" on page 127.
1 From your Inbox, touch the current account at the top right of the screen. Or press
Menu
Each account is listed, along with the number of unread messages in your Inbox or
Priority Inbox, depending on which inbox is your default. The default inbox for each
account is also displayed (see "Working with Priority Inbox" on page 149).
2 Touch the account that contains the email you want to read.
The acount's Inbox or Priority Inbox opens, depending on the default inbox you set.
Use Gmail offline
If you aren't connected to a mobile data or Wi-Fi network (for example, if you're in
Airplane mode), you can use Gmail to read or reread the messages currently synced to
your phone (see "Synchronizing your conversations by label" on page 156) and to
compose messages.
Messages that you send are stored on your phone with the Outbox label, until your
connection is restored, when they are sent automatically. You can view the messages
stored with the Outbox label; see "Viewing conversations by label" on page 155.
AUG-2.3-103
and touch Accounts.
The number of unread messages.
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Android User's Guide