To capture the screen with your Android phone, you can easily press and hold the Power and Volume down key at the same time. But on Huawei devices, like P1 or Ascend P6 there another simpler way:
1. Drag down the notification bar, go to More, and add the screen shot shortcut to the notification panel. (To see more details, read: How to Customize Notification Panel on Ascend P6)
2. Now, to take the screen shot, you just need to drag down the notification bar and tap the Screenshot icon.