HTC One X
How To Take A Screenshot or Screen Capture With The HTC One X:
To take a screenshot or screen capture with the HTC One X, simply:
Hold down the VOLUME DOWN button and the POWER button for a few seconds. The VOLUME DOWN button is on the side of the phone on the right and the POWER button is on the top of the phone.
Alternatively, hold down POWER and HOME. HOME is the middle touchscreen button on the front of the phone.
Using this method, the screenshots will appear in the DCIM folder of the phone.