Galaxy S6 and Galaxy S6 edge share identical buttons. The functions of Galaxy S6 buttons are identical to those on Galaxy S6 edge.
There are 5 physical buttons on Galaxy S6 (and on Galaxy S6 edge).
Galaxy S6 Home button is located below the screen. You may refer to this page on Galaxy S6 layout.
Galaxy S6 fingerprint sensor is also embedded into the Home button. When you touch the Home button, Galaxy S6 may also scan you fingerprint.
When the Galaxy S6 screen is locked, press the Home button to turn on the screen. But you are still on the lock screen.
When you are using any apps on Galaxy S6, press the Home button to suspend the app and return to home screen.
When the screen is not locked and you are on any other pages, press Galaxy S6 Home button to return to home screen.
When the screen is not locked, press and hold Galaxy S6 Home button to launch Google Now.
Galaxy S6 Power button is located in the right side of Galaxy S6.
When the phone is powered off, press and hold Galaxy S6 Power button to power on the phone.
When the phone is powered on, press and hold Galaxy S6 Power button to get power options, including restarting the phone and powering off the phone.
When the screen is on, press Galaxy S6 Power button to turn off the screen and lock the screen by default.
When the screen is off, press Galaxy S6 Power button to turn on the screen. In this case, the function is same as pressing Home button.
You may also configure the galaxy S6 power button for other functions, e.g., ending a phone call.
The main function of the Galaxy S6 Back button is to return to the previous screen of the app you are running.
The actual behavior of Galaxy S6 Back button may depend on individual app. Some apps may just exit once you tap the Galaxy S6 Back button.
In Samsung Galaxy S6 and Galaxy S6 edge, by default, the light duration (when touched) of Back button and Recent buttons are NOT user-configurable, unlike previous generation Galaxy S or Galaxy Note devices. If you want to change the light duration or turn off the light for Galaxy S6 Back button and Recent Apps button, please check this guide.
Galaxy S6 Recent Apps button allows you to access previously-opened apps.
Tap Galaxy S6 Recent Apps button to see a list of apps opened since last phone reboot. You can tap any of these apps in the list to re-open it. The behavior of re-opening the app depends on individual apps and system available resources.
Tap and hold Galaxy S6 Recent Apps button to launch the split screen view. This allows you to access the new multi-window feature on Galaxy S6.
Just like other smartphones, Galaxy S6 Volume button let you control the volume of the phone.
Tap Volume up (top part) to increase the volume. Volume down (bottom part) to lower the volume.
Some apps may also use volume button for special functions. For example, in the messaging app, you can use volume button to increase or decrease the font size. In camera app, you can use volume keys to take photos or to record videos or to zoom in/out the camera (please check this page on how to use volume key to control Galaxy S6 camera).
If you have any questions or encounter any problems on using Galaxy S6 buttons, please leave your questions or problems in the comment box below.
For other features of Galaxy S6, please check Galaxy S6 online manual page.
For detailed guides on how to use Samsung Galaxy S6, please check Galaxy S6 how-to guides page.