Share your experience!
After i updated my experia z with the 4.2.2 update the screenshot function disappered and cant do one anymore.
You can, if you press the Power and Volume-down buttons simultaneously.
Or you can use the Clip Manager small app from the small apps menu. Clip Manager is better, because you can add notes or edit your screenshot and it's much more practical to take screenshot. It's not comfortable to take with 2 button combo with a large headset like this.