Master Mail Concepts - Take Control of Apple Mail (1.0) - page 23

server but also cached to your Mac—see the sidebar Cached Messages ahead). However, what
you see in that sidebar can vary tremendously based on your accounts and settings. Here are
the main facts you should know:
• Reordering: You can drag any section heading (a section heading appears in
all caps, such as MAILBOXES, ICLOUD, or GMAIL) to move it higher or lower
in the list. In addition, you can drag individual mailboxes within a section up
or down to reorder them or to move one mailbox into another, in which case
the higher-level mailbox acts like a folder. However , you can't reorder top-level
mailboxes in a Gmail account, although you can reorder sub-mailboxes within
those mailboxes. (No, I don't get it either.)
• Hidden headings: A heading appears only if there's something to go under it
(see Hidden Interface Elements ). In general, that means user-created mailboxes.
So, if you have an iCloud account with only the standard Special Mailboxes (and
default settings), you won't see an ICLOUD heading in the sidebar. However, if
you create a new mailbox on the iCloud server (choose Mailbox > New Mailbox
and then choose iCloud from the Location pop-up menu), the iCloud heading ap-
pears with your new mailbox underneath it.
• Collapsing and expanding: If you move your pointer over a heading, the
word Show or Hide will appear to its right. Click this to expand (Show) or col-
lapse (Hide) the list of mailboxes beneath. But the heading itself isn't hidden as
long as there's something underneath it (per the previous point).
• Nesting mailboxes: You can nest mailboxes inside one another just as you can
do with folders in the Finder. Drag a mailbox onto another one to make it a sub-
mailbox; drag it up a level (a horizontal line shows where it will land when you
release the button) to promote it.
• Local vs. server: Mail doesn't always make it obvious whether a mailbox is
stored locally or on a server. If a mailbox is listed under the heading for a server-
based account, it's located on the server. If a mailbox is listed under the ON MY
MAC heading (which, again, won't appear unless there's something under it), it's
stored locally. (To create a new local mailbox, choose Mailbox > New Mailbox
and then choose On My Mac from the Location pop-up menu.)
However, the Special Mailboxes such as Inbox and Sent follow slightly different
rules. Except for Inbox, if a special mailbox has an account-specific mailbox un-
derneath, that mailbox is stored on a server—although, as I explain ahead, the
name of the mailbox on the server may not match what you see in Mail. If you
have only POP accounts, all the special mailboxes are stored locally.