One possible reason for this is screen use: using a screen emitting a lot of blue light close to bedtime disrupts your circadian rhythms and makes your brain think it's still daytime. Apple thinks it has a solution to this, and it's called Night Shift. In this article we explain how to switch on Night Shift on your iPhone or iPad , and how it proposes to improve your twilight habits.
Night Shift has also been available on macOS since the Sierra update.
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Here's how to turn on Night Shift on Mac. And if you're interested in how this differs from related screen tech, see True Tone vs Night Shift. Night Shift, which reduced the level of blue light being emitted by the iPad and iPhone, arrived with the iOS 9. It's a colour-shifting technology that reduces emissions of blue light, which is said to keep us awake and cause eye-strain and headaches, and makes screen colours appear warmer and more yellowy.
It's hard to say if Night Shift will help you sleep if you have difficulty dropping off. And as for reducing eye strain, it's probably just as bad that we read tiny text on our iPhones. The surest way to improve sleep is probably to leave your device in another room - but Night Shift is worth a try.
Dark Mode is about changing white or light screen interface furniture black or dark, which is more restful at night. For example, to use Command-C copy , press and hold the Command key, then the C key, then release both keys. Mac menus and keyboards often use symbols for certain keys , including modifier keys:. To use these keys as F1, F2, F3, or other standard function keys, combine them with the Fn key. You might need to press and hold some of these shortcuts for slightly longer than other shortcuts.
This helps you to avoid using them unintentionally. For more shortcuts, check the shortcut abbreviations shown in the menus of your apps. Every app can have its own shortcuts, and shortcuts that work in one app might not work in another. Mac keyboard shortcuts By pressing certain key combinations, you can do things that normally need a mouse, trackpad, or other input device. This also works for files in the Finder. In some apps, you can undo and redo multiple commands. To find the previous occurrence, press Shift-Command-G.
Command-S : Save the current document. Command-T : Open a new tab. To close all windows of the app, press Option-Command-W. Control—Command—Space bar : Show the Character Viewer, from which you can choose emoji and other symbols.
Control-Command-F : Use the app in full screen, if supported by the app. Learn more about screenshots. Shift-Command-N: Create a new folder in the Finder. Sleep, log out, and shut down shortcuts You might need to press and hold some of these shortcuts for slightly longer than other shortcuts. Press and hold for 1. If any open documents have unsaved changes, you will be asked whether you want to save them. You will be asked to confirm. Finder and system shortcuts Command-D : Duplicate the selected files.
Command-E : Eject the selected disk or volume. Command-F : Start a Spotlight search in the Finder window. Command-I : Show the Get Info window for a selected file. Command-R : 1 When an alias is selected the Finder: show the original file for the selected alias. Shift-Command-C : Open the Computer window. Shift-Command-D : Open the desktop folder. Shift-Command-F : Open the Recents window, showing all of the files you viewed or changed recently. Shift-Command-K : Open the Network window. Option-Command-L : Open the Downloads folder. Shift-Command-N: Create a new folder.
Shift-Command-O : Open the Documents folder.
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Shift-Command-T : Show or hide the tab bar in Finder windows. Option-Command-D : Show or hide the Dock. Option-Command-P : Hide or show the path bar in Finder windows. Command-J : Show View Options. Command-K : Open the Connect to Server window. Command-L : Make an alias of the selected item. Command-N : Open a new Finder window. Command-T : Show or hide the tab bar when a single tab is open in the current Finder window. Option-Command-T : Show or hide the toolbar when a single tab is open in the current Finder window.
Option-Command-V : Move: Move the files in the Clipboard from their original location to the current location. Command-Y : Use Quick Look to preview the selected files. Command-1 : View the items in the Finder window as icons. Command-2 : View the items in a Finder window as a list.
Command-3 : View the items in a Finder window in columns. Command-4 : View the items in a Finder window with Cover Flow. Command—Left Bracket [ : Go to the previous folder.
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Command—Right Bracket ] : Go to the next folder. Command—Up Arrow : Open the folder that contains the current folder. Command—Control—Up Arrow : Open the folder that contains the current folder in a new window.
Command—Down Arrow : Open the selected item. Right Arrow : Open the selected folder. This works only when in list view. Left Arrow : Close the selected folder. Command-Delete : Move the selected item to the Trash. Shift-Command-Delete : Empty the Trash. Command—Brightness Up : Turn target display mode on or off. Option—Brightness Up : Open Displays preferences. This works with either Brightness key.
Control—Brightness Up or Control—Brightness Down : Change the brightness of your external display, if supported by your display. Add the Control key to this shortcut to make the adjustment on your external display, if supported by your display. Command—Mission Control : Show the desktop.
Control—Down Arrow : Show all windows of the front app. Option—Volume Up : Open Sound preferences.
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