HTC One M8 for Windows - Manual (Page 35)

Set volume to automatically rise while in your pocket or bag
On a noisy street and can't hear your phone
ringing in your bag?
You can set your phone to automatically detect
when it's in your bag or pocket and raise the
ringtone volume so that you can hear it in noisy
environments.
Rotate your phone for a better view
For many screens, you can
automatically change the
screen orientation from
portrait to landscape by
turning your phone sideways.
When entering text, you can
turn your phone sideways to
bring up a bigger keyboard.
Your first week with your new phone 35