HTC Inspire 4G - Manual (Page 145)

145 Camera
Shutter sound Select or clear this check box, depending on whether you want
the camera to play a sound when you press the shutter release or
record button.
Grid (photo mode only) Select this check box when you want to display a grid on the
Viewfinder screen so you can easily frame and center your
subject before taking the photo.
Record with audio
(video mode only) Select or clear the check box, depending on whether you want to
record audio when capturing videos.
Reset to default Change the camera back to default settings.