Samsung Galaxy S7 Edge reset to factory settings using the keys:

Samsung Galaxy S7 can not turn on the Edge or device can not access the phone settings, you can reset your phone to factory settings using the hardware buttons on the Samsung Galaxy S7 Edge.

Turn off your phone.
In the closed position Volume Up + Home buttons while holding down the Power (Power) Press.
opening the phone, release the button when the Samsung logo appears.

Recovery (Recovery) when the screen; Volume Down button on the screen that with the help of Wipe Data / Factory Reset Select On (Power) Press.
Select Yes-On (Power) Press.
On the screen that appears, select Reboot System Now the (Power) Press.
Samsung Galaxy S7 Edge format, Disposal was conducted. Your phone will be reset to factory settings.