How to Enable the Double Tap to Wake Xperia Z3 Feature
Double tap to wake Xperia Z3 means you just need to double tap the screen to turn it on. So, you don't need to press the power button with this ...
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The Duo Camera feature on HTC One M8 lets you change the focus in a photo after shot's been taken. To manually change focus in a photo on HTC One M8 do as follows:
1. Open the photo you'd like to change focus (The photo must have been taken via the device's rear camera)
2. Tap the Effects button and then tap the UFocus to enable changing focus mode
3. Now you just need to tap anywhere to Re-focus