OS X Yosemite: Create keyboard shortcuts for apps
Assign your own keyboard shortcuts to menu commands in any OS X app, including Finder. This might be useful if a global shortcut, which works the same with most apps, conflicts with a specific app shortcut. In this case, you could assign a different key combination.
You can only create keyboard shortcuts for existing menu commands. You cannot create keyboard shortcuts for general purpose tasks such as opening an app.
Choose Apple menu > System Preferences, then click Keyboard.
Click Shortcuts, select App Shortcuts, then click Add (+).
Click the Application pop-up menu, then choose an app. If you want to set the same key combination for a menu command that appears in many apps, choose All Applications.
If the app you want to select doesn’t appear in the list, choose Other, then locate it using the Open dialog. Some apps may not allow you to set keyboard shortcuts.
Type the menu command for which you want to set a keyboard shortcut in the Menu Title field.
You must type the command exactly as it appears in the Application menu, including ellipses and any other punctuation. To type an ellipsis, use three periods without spaces.
Click in the Keyboard Shortcut field, press the key combination that you want to assign to the menu command, then click Add (+).
You can’t use each type of key (for example, a letter key) more than once in a key combination.
Quit and restart any apps you’re using for the new keyboard shortcut to take effect.
If you assign a keyboard shortcut that already exists for another command or another app, your new shortcut won’t work. Find the menu command that’s using it, then reassign the keyboard shortcut for that item.
To remove a customized shortcut, click Delete (–).