Apple iPhone OS 3.1 - Manual (Page 61)

On each account screen, you can see the number of unread messages in each mailbox.
Number of unread
messages
Tap to see all your
email accounts
Tap a mailbox to see its messages. Unread messages have a blue dot next to them.
Unread messages
When you open a mailbox, Mail loads the number of most recent messages specified
in your Mail settings, if the messages haven’t already been loaded automatically.
(See “Mail” on page 152.)
Load additional messages: Scroll to the bottom of the list of messages and tap Load
More Messages.
Read a message: Tap a mailbox, then tap a message. Within a message, tap or to
see the next or previous message.
Zoom in on part of a message Double-tap an area of the message to zoom in.
Double-tap again to zoom out.
Resize any column of text to fit the screen Double-tap the text.
Resize a message manually Pinch to zoom in or out.
61 Chapter 4 Mail