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Christmas Gift Guide

Finally! A "Back" button

Night Shift helps you sleep

Add a password to the Notes app

A new look for Multitasking

Select multiple photos

New in News

Transit directions in Apple Maps

Keep watching that video

Sliding over on the iPad

Customize your Safari Reader

Sort Notifications as you please

Low Power mode

You can be Siri's only friend

A new iPad keyboard

Search your Settings

Track your accessory's battery

Wi-Fi Assist

Disconnect in an instant

A six-digit passcode

More Search options

Edit your docs

New in Notes

In case you're embarrassed

Draw mustaches on your friends

Ready for your closeup

Get your old keyboard back

Skip that mobile site

More Siri searches

Know your battery better

Back to your camera

Forget your calculator

Search a web page

Add attachments

For all those selfies

After opening a Notification from an unrelated app (like Facebook, for instance) you can go directly back to the app by clicking the "Back to..." link at the top left of your screen. Learn how to use iOS's back button.

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The iOS 9.3 update adds Night Shift, a feature that changes the color temperature of your screen to match the time of day.

When evening rolls in, the screen will switch to a warmer hue. Learn how to set up, schedule and use Night Shift.

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You can now password-protect notes to keep them safe. iOS 9.3 lets you use Touch ID or a password to lock up your notes. Learn how to set a password for your iOS notes.

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When multitasking (switching between apps) the app thumbnails are displayed in a stack rather than side-by-side. The core experience is the same, but the arrangement saves space. Learn how to use the new app switcher in iOS 9.

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Previously, selecting multiple photos was a tedious pick-them-one-by-one process. You can grab a whole swath of photos just by sliding your finger across the screen. Learn how to select multiple photos at once.

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Apple's News app, is a Flipboard-like news aggregator. It automatically builds a personalized list of content based on the sources that you choose and the articles you read. The app is even better in iOS 9.3, which adds trending news topics and curated picks. Get more details on using iOS 9's News app here.

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Since the rocky start of Apple Maps three years ago, you've had to jump to a rival service (like Google Maps) to get transit directions. With iOS 9 though, your bus, train or subway (or the Tube if you prefer) has finally arrived. Learn how to get transit directions in Apple Maps here.

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A new iPad-only feature lets you keep watching a video or conduct a FaceTime call while you're using another app. Learn how to use the picture-in-picture feature in iOS 9.

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Swipe in from the right side on the iPad and you'll see a new way to multitask. Learn how to use the "slide-over" feature.

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To make reading even easier, change the font size and type and select a background color for articles you read in Safari. Learn how to customize Safari Reader's appearance.

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Choose how you'd like to see your Notifications. Recent will group notifications in a unified list. Group will let you manually define the order as you see fit. Learn how to customize your notification order.

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The new Low Power setting reduces the strain on your battery when it drops below 20 percent by (among other things) suspending background app refresh. Learn how to use low-power mode in iOS 9.

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The "Hey Siri!" feature has been around since iOS 8, but iOS 9 lets you teach Siri to recognize only your voice.

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Press and hold two fingers on the iPad's keyboard to turn it into a trackpad for quickly navigating and editing text. Get more details here.

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Are you trying to remember where to find that obscure setting? Just search the Settings app. Get more details here.

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If you have an accessory connected through Bluetooth you can check its battery level on the Today panel of the Notifications menu. Here's how.

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Wi-Fi Assist will tell your iPhone to switch over to a cellular connection when it deems Wi-Fi connectivity to be poor. Activate it under the Cellular menu in the Settings app. Here's how and why to enable Wi-Fi Assist.

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Drop a Bluetooth-connect device quickly right from the Bluetooth menu. Get more details here.

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If remembering them won't be a problem, you can expand your numeric passcode from four to six digits. Here's how.

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The Spotlight Search feature returns options in three categories: Siri suggestions, Nearby and News. If it's all too much you can pare down the results as you like. Learn how to customize proactive search.

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You can mark up your attached docs, such as PDFs, without leaving the Mail app. Get more details here.

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A refined Notes app delivers several new features, such as letting you draw with your finger, add photos and maps. Learn more details here.

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If you have certain photos you'd rather not anyone else see, you can hide them from your Moments collection by selecting your photo (or photos), clicking the share icon in the bottom left corner and then the Hide button. Get more details here.

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After attaching a photo to an email, you can draw on it, write text or add your signature. To get there, just press and hold on the photo and use the "markup" option.

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Just like with photos, you can pinch to zoom in on videos as they play.

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If you miss the ALL CAPS keyboard you had before your iOS 9 upgrade, there's a toggle switch buried in Settings that will bring it back. Here's where to find it.

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If you'd rather view the desktop version of a website in the Safari browser, you can jump straight there by selecting the Share button and the "Request Desktop Site" button.

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If you ask Siri, she (or he) can pull up all photos taken in a specific location or on a chosen date.

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Under a new dedicated Battery option in the Settings menu, you can see not only what percentage of the battery each app is using, but also how much time they've been running both on the screen and in the background.

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Get back to your camera in an instant by swiping down on a photo you've already taken.

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You can do math and currency conversions in the Search field.

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To find words on a page in Safari, press the Share icon, touch "Find on Page" and start typing your word.

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With iCloud Drive, you can attach more than just photos and videos to an email. Learn how to set up iCloud Drive.

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Your photos apps has a dedicated Selfies folder for gazing at vanity shots of your lovely mug.

For more iOS 9 advice, check out our complete guide.

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