OnePlus X : Combinations of hardware buttons

We are going to describe several combinations of hardware buttons for OnePlus X phone.

When device is powered off:

Press during several seconds:

Volume down + power --> boot into recovery mode.

Volume up + power --> boot into fasboot mode.

When device is powered on:

Volume down + power --> take a screenshot.

If we activate screenshot in power menu we can also take screenshots using power button:

Settings -> Buttons -> Power menu -> Screenshot (enable it)
Press power button some seconds, and a menu will appear:
Power off
Airplane mode

Select Screenshot.