Menulets: The Missing Manual
See the menu-bar icons in Figure 4-11? Apple calls them Menu Extras, but Mac fans on the Internet have named them menulets. Each is both an indicator and a menu that provides direct access to certain settings: sound, monitor resolution, WiFi, and so on.
To make the various menulets appear, you generally visit a certain pane of System Preferences (Chapter 9) and turn on a checkbox called, for example, “Show volume in menu bar.” Here’s a rundown of the various Apple menulets you may encounter, complete with instructions on where to find the magic on/off checkbox for each.
Along the way, you’ll discover that secondary, hidden features lurk in many of these menulets, if you happen to know the secret: Press the Option key.
Tip
The following descriptions indicate the official, authorized steps for installing a menulet. There is, however, a folder on your hard drive that contains 24 of them in a single window, so you can install one with a quick double-click. To find them, open your hard drive→System→Library→CoreServices→Menu Extras folder.

Figure 4-11. These little guys are the cousins of the controls found on the Windows system tray.
AirPort lets you turn your WiFi (wireless networking) circuitry on or off, join existing wireless networks, and create your own private ones. To find the Show checkbox: Open System Preferences→Network. Click Wi-Fi.
Tip
Once you’ve installed ...
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