Use Spotlight Search
Spotlight is a feature that lets you search content and suggests services you might be interested in. To access Spotlight, swipe right from the Home screen. Frequent contacts and apps are located under Siri Suggestions. Under Nearby, you'll see location suggestions (which vary according to the time of day), and under News you'll find the day's top stories. The primary Spotlight feature, however, is Search, which is located at the top of the screen and displays results by app, video, movies, and Bing search. To customize what appears in Spotlight, go to Settings > General > Spotlight Search. Activate Reachability to Use Your iPhone One Handed
If you're having trouble accessing items at the top of the screen on your iPhone 6s or 6s Plus, give your overstretched thumb a break and start using Apple's Reachability feature to bring the top of the screen within reach. Tapping twice (not clicking) on the Home button will cause the iPhone's screen to shift about a third of the way down—enough to put items on the top of the screen within reach of your thumb. You will not be able to access items on the lower part of the screen while using Reachability. To turn off the feature, double tap or click the Home button once.
To add widgets to the Notification Center, you must have apps on your device that have an associated widget. To turn on widgets, swipe down from the top of the screen to reveal Notification Center. In the Today view, scroll to the bottom and tap Edit. Here, you'll see a list of the widgets that are available to you. To add a widget, simply tap the green + icon to the left of the app's name in the lower list. To remove a widget, tap the red - icon in the list up top. To change the order in which the widgets appear, tap and hold the parallel lines icon to the right and drag them to your desired location. Send and Receive AirDrop Files
With AirDrop, you can wirelessly send and receive photos, videos, websites, locations, and more with nearby Apple devices. For AirDrop to work, you must turn on both Wi-Fi and Bluetooth and sign in to your iCloud account. To receive a file using AirDrop, swipe up from the bottom of the screen and select AirDrop. You can then choose to receive AirDrops from Everyone or Contacts Only, or turn the feature off completely. If you're sending a file, you'll need to make sure your recipient's iPhone is unlocked and AirDrop is enabled. When someone sends you an AirDrop file, you'll be able to accept or decline it.