How to Set Dock Preferences in Mac OS X Lion
You can change a few things about the Mac OS X Lion Dock to make it look and behave just the way you want it to. First, look at the Max OS X Lion global preferences that apply to the Dock itself. Then explore some preferences that apply only to folder and disk icons in the Dock.
Mac OS X Lion Global Dock preferences
To change global Dock preferences, choose Apple→Dock→Dock Preferences. The System Preferences application opens, showing an active Dock pane.

You can also open the Dock Preferences by right-clicking or Control+clicking the Dock Resizer and choosing Dock Preferences from the contextual menu.
Now you can adjust your Dock with the following preferences:
As you add items to the Dock, the icons, and the Dock itself, the icons will shrink to accommodate the new ones.
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Magnification: This slider controls how big icons grow when you pass the arrow cursor over them. Or you can deselect this check box to turn off magnification entirely.
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Position on Screen: Choose one of these three radio buttons to attach the Dock to the left side, the right side, or the bottom of your screen (the default).
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Minimize Windows Using: From this handy pop-up menu, choose the animation that you see when you click a window’s Minimize button (the yellow gumdrop).
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Minimize Windows into Application Icon: If you select this option, when you minimize a window by clicking its yellow gumdrop button, you won’t see a Dock icon for that window.
If this option isn’t selected, each window you minimize gets its own personal icon on the right side of your Dock.
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Animate Opening Applications: Mac OS X Lion animates (bounces) Dock icons when you click them to open an item. If you don’t like the animation, deselect (that is, uncheck) this check box, and the bouncing ceases.
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Automatically Hide and Show the Dock: Choose the Automatically Hide and Show the Dock check box; after that, the Dock displays itself only when you move the cursor to the bottom of the screen where the Dock would ordinarily appear.
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Show Indicator Lights for Open Applications: Select this option if you want all open applications to display an indicator light below their Dock icons.
Folder and Disk Dock Icon Menu Preferences
If you click a folder or disk icon in the Dock, its contents are displayed in a Fan, Grid, or List menu.

If you right- or Control-click a folder or disk icon in the Dock, its Options menu is displayed.

Here are the choices on the Options menu:
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Sort By, which determines the order in which items in the folder or disk are displayed when you click its Dock icon.
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Display As determines what the Dock icon for a folder or disk looks like.
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View Contents As lets you choose Fan, Grid, or List as the menu type for the folder or disk.
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Options submenu:

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A protocol for connections to your Ethernet network and your Apple TV unit.

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The place for addresses, phone numbers, and e-mail addresses on the Mac. You can also add a picture and note about the person.

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alias
A pointer to another application of folder.

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Bluetooth
A short-range wireless technology that lets your Mac communicate with other compatible gadgets, from up to 30 feet away.

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ColorSync
A printer setting that lets you add black and white, blue tone, sepia, or other filters.

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cookie
A small file that a web site automatically saves on your hard drive. It contains information that the site will use on your future visits. For example, a site might save a cookie to preserve your site preferences for the next time or ¯ in the case of a site such as Amazon.com ¯ to identify you automatically and help customize the offerings that you see.

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Dashboard
A translucent screen that lays on top of your desktop and houses clever little applications called widgets.

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desktop
The whole of your Mac’s computer screen. Also called the Finder.

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Discoverable mode
Helps other Bluetooth devices find your Mac.

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Dock
The colorful bar on the bottom of the Mac screen. It’s a rough cross between the Windows taskbar and the Start menu.

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double-clicking
Left-clicking twice in rapid succession while keeping the cursor in the same location.

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dragging
Positioning the cursor on top of a symbol or icon and then holding down the mouse button and rolling the mouse across your desk, which moves the symbol or icon to a new location.

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driver
A software program provided by the printer manufacturer that tells Mac OS X how to communicate with your printer.

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Dynamic Host Configuration Protocol; DHCP
A protocol that enables a computer to automatically get connection information for communicating with a network or your ISP.

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Exposé
A Mac feature that, with a click of a button, organizes your Mac desktop.

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FileVault
A Mac feature that automatically scrambles, or encrypts, the data in your Home folder.

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Finder
The application that Mac OS X runs to display the operating system’s menus and windows.

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FireWire
A speedy connector often used with digital cameras.

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FTP
Part of the TCP/IP protocol suite; (the hoary acronym FTP stands for File Transfer Protocol. FTP is one of the oldest methods for sharing files between computers

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function keys
Housed on the top row of the Mac keyboard, the keys with the letter F followed by a number.

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iCal
The Mac’s built-in calendar.

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iDVD
The application that lets you burn movies onto a disk.

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iMac
A Mac desktop computer.

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iPhoto
The application where you store and touch up digital images.

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iSync
The application that keeps your calendar, Address Book, and Internet bookmarks synchronized across multiple devices.

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iTunes
Apple’s renowned musical jukebox.

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iWeb
The tool that lets you create personal Web sites, blogs, and podcasts.

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Lightweight Directory Access Protocol; LDAP
With LDAP, you can search a central company directory from anywhere in the world as long as you have an Internet connection.

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Lightweight Extensible Authentication Protocol
An encryption protocol developed by Cisco Systems for superior security in the business world.

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Mac Mini
Apple’s budget desktop computer. Weighing less than 3 pounds, it’s portable, but not in the same sense as a notebook.

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Mac OSx
The operating system that Apple included with all new Mac computer systems since 2002.

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Mac Pro
A Mac desktop intended for professionals facing demanding graphics and other computing tasks. Its arrival completed the transition of the Mac line to Intel processors.

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MacBook Air
Apple’s super-thin Mac. Encased in aluminum with a 13.3-inch display, Air measures just 0.16 inches at its skinniest point and just 0.75 inches at its thickest. But it still boasts a full-size keyboard and very good battery life.

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MacBook, MacBook Pro
Apple’s successor to the PowerBook.

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Mail
Apple’s built-in calendar.

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MobileMe
The application that keeps your e-mail, contacts, and calendar synchronized, no matter what device you’re using.

Macs and OS X Glossary
Network interface card
A hardware device that your computer uses to talk to the rest of the network.

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operating software
The software that makes a Mac work.

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parental controls
Safety features that let you place limitations on your child’s computer use.

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partition
A formatted section of a disk that contains data.

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PDF
A special document display format developed by Adobe; they display like a printed document but take up minimal space.

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phishing
A form of Internet fraud where identity thieves, posing as a respectable financial or Internet company, tries to dupe you into clicking phony links to verify personal or account information.

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RAID set
A group of multiple separate disks, working together as a team.

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Safari
The Mac’s Web browser.

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Smart Groups
A way to group contacts in your Address Book.

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Smart Mailboxes
Searches for e-mail that matches specific search criteria.

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Spotlight
The Mac’s search technology.

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start-up disk
The boot drive that contains the Mac OS X system you’re using at the moment

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thread
Contains an original message and all related replies, which makes it easy to follow the flow of an e-mail discussion without bouncing around within your Inbox, searching for the next message in the conversation.

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trackpad
The smooth surface below your Mac keyboard that’s your laptop’s answer to using a mouse.

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USB port
The place on your Mac where you plug in devices you want to connect, such as printers, scanners, digital cameras, and more.

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Voiceover
A screen reader designed to make using a Mac easier by speaking the contents of the screen.

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wireless network
A network that isn’t connected by wires but uses radio waves, instead.