To use a keyboard shortcut, hold down one or more modifier keys while pressing the last key of the shortcut. For example, to use the shortcut Command-C (copy), hold down Command, press C, then release both keys. Mac menus and keyboards often use symbols for certain keys, including the modifier keys:

要使用键盘快捷键，按住一个或多个修改器键，同时按下快捷键的最后一个键。例如，使用快捷方式Command-C(copy)，按住命令，按C，然后释放两个键。Mac菜单和键盘经常使用[符号来确定某些键],包括修饰词键:

If you're using a keyboard made for Windows PCs, use the Alt key instead of Option, and the Windows logo key instead of Command. Some Mac keyboards and shortcuts use special keys in the top row, which include icons for volume, display brightness, and other functions. Press the icon key to perform that function, or combine it with the Fn key to use it as an F1, F2, F3, or other standard function key. 

如果你使用的是为Windows pc制造的键盘，使用Alt键代替选项，而Windows标志键代替命令。一些Mac键盘和快捷键在最上面一行中使用特殊键，其中包括音量图标、显示亮度和其他功能。按下图标键执行该功能，或将其与Fn键结合使用它作为F1、F2、F3或其他标准功能键。

To learn more shortcuts, check the menus of the app you're using. Every app can have its own shortcuts, and shortcuts that work in one app might not work in another.

要了解更多快捷方式，请查看你正在使用的应用程序的菜单。每个应用都可以有自己的快捷方式，而在一个应用中工作的快捷方式可能不会在另一个应用中发挥作用。

Cut, copy, paste, and other common shortcuts

Sleep, log out, and shut down shortcuts

Shortcut	Description
Power button	Press to turn on your Mac or wake your Mac from sleep. Press and hold for 1.5 seconds while your Mac is awake to display a dialog asking if you want to sleep, restart, or shut down. If you don't want to wait 1.5 seconds, press Control–Power button or Control–Media Eject  .* Press and hold for 5 seconds to force your Mac to turn off.
Control–Command–Power button	Force your Mac to restart.*
Control–Shift–Power button or  Control–Shift–Media Eject	Put your displays to sleep.*
Control–Command–Media Eject	Quit all apps, then restart your Mac. If any open documents have unsaved changes, you'll be asked whether you want to save them.*
Control–Option–Command–Power button or  Control–Option–Command–Media Eject	Quit all apps, then shut down your Mac. If any open documents have unsaved changes, you'll be asked whether you want to save them.*
Shift-Command-Q	Log out of your macOS user account. You'll be asked to confirm.
Option-Shift-Command-Q	Log out of your macOS user account immediately, without being asked to confirm.

*Doesn't apply to keyboards that have a Touch Bar.

Document shortcuts

Shortcut	Description
Command-B	Boldface the selected text, or turn boldfacing on or off.
Command-I	Italicize the selected text, or turn italics on or off.
Command-U	Underline the selected text, or turn underlining on or off.
Command-T	Show or hide the Fonts window.
Command-D	Select the Desktop folder from within an Open dialog or Save dialog.
Control-Command-D	Show or hide the definition of the selected word.
Shift-Command-Colon (:)	Display the Spelling and Grammar window.
Command-Semicolon (;)	Find misspelled words in the document.
Option-Delete	Delete the word to the left of the insertion point.
Control-H	Delete the character to the left of the insertion point. Or use Delete.
Control-D	Delete the character to the right of the insertion point. Or use Fn-Delete.
Fn-Delete	Forward delete on keyboards that don't have a Forward Delete  key. Or use Control-D.
Control-K	Delete the text between the insertion point and the end of the line or paragraph.
Command-Delete	Select Delete or Don't Save in a dialog that contains a Delete or Don't Save button.
Fn–Up Arrow	Page Up: Scroll up one page.
Fn–Down Arrow	Page Down: Scroll down one page.
Fn–Left Arrow	Home: Scroll to the beginning of a document.
Fn–Right Arrow	End: Scroll to the end of a document.
Command–Up Arrow	Move the insertion point to the beginning of the document.
Command–Down Arrow	Move the insertion point to the end of the document.
Command–Left Arrow	Move the insertion point to the beginning of the current line.
Command–Right Arrow	Move the insertion point to the end of the current line.
Option–Left Arrow	Move the insertion point to the beginning of the previous word.
Option–Right Arrow	Move the insertion point to the end of the next word.
Shift–Command–Up Arrow	Select the text between the insertion point and the beginning of the document.
Shift–Command–Down Arrow	Select the text between the insertion point and the end of the document.
Shift–Command–Left Arrow	Select the text between the insertion point and the beginning of the current line.
Shift–Command–Right Arrow	Select the text between the insertion point and the end of the current line.
Shift–Up Arrow	Extend text selection to the nearest character at the same horizontal location on the line above.
Shift–Down Arrow	Extend text selection to the nearest character at the same horizontal location on the line below.
Shift–Left Arrow	Extend text selection one character to the left.
Shift–Right Arrow	Extend text selection one character to the right.
Option–Shift–Up Arrow	Extend text selection to the beginning of the current paragraph, then to the beginning of the following paragraph if pressed again.
Option–Shift–Down Arrow	Extend text selection to the end of the current paragraph, then to the end of the following paragraph if pressed again.
Option–Shift–Left Arrow	Extend text selection to the beginning of the current word, then to the beginning of the following word if pressed again.
Option–Shift–Right Arrow	Extend text selection to the end of the current word, then to the end of the following word if pressed again.
Control-A	Move to the beginning of the line or paragraph.
Control-E	Move to the end of a line or paragraph.
Control-F	Move one character forward.
Control-B	Move one character backward.
Control-L	Center the cursor or selection in the visible area.
Control-P	Move up one line.
Control-N	Move down one line.
Control-O	Insert a new line after the insertion point.
Control-T	Swap the character behind the insertion point with the character in front of the insertion point.
Command–Left Curly Bracket ({)	Left align.
Command–Right Curly Bracket (})	Right align.
Shift–Command–Vertical bar (|)	Center align.
Option-Command-F	Go to the search field.
Option-Command-T	Show or hide a toolbar in the app.
Option-Command-C	Copy Style: Copy the formatting settings of the selected item to the Clipboard.
Option-Command-V	Paste Style: Apply the copied style to the selected item.
Option-Shift-Command-V	Paste and Match Style: Apply the style of the surrounding content to the item pasted within that content.
Option-Command-I	Show or hide the inspector window.
Shift-Command-P	Page setup: Display a window for selecting document settings.
Shift-Command-S	Display the Save As dialog, or duplicate the current document.
Shift–Command– Minus sign (-)	Decrease the size of the selected item.
Shift–Command– Plus sign (+)	Increase the size of the selected item. Command–Equal sign (=) performs the same function.
Shift–Command– Question mark (?)	Open the Help menu.

Finder shortcuts

Other shortcuts

• Shortcuts you can use while your Mac is starting up
• Shortcuts for accessibility features
• Shortcuts for Safari 8 (Yosemite) 
• Shortcuts for Safari 9 (El Capitan)

Learn more

• Create your own shortcuts and resolve conflicts between shortcuts
• Type letters with accents
• Type symbols, dingbats, and other special characters
• Change the behavior of the function keys or the Caps Lock, Control, Option, and Command keys
• Use a spoken command for a keyboard shortcut