HTC Merge User Manual page 237

Camera 
Resolution
Select a photo or video resolution to use for capturing. If you
want to record high-definition videos, select 720p (1280 x 720).
Widescreen (photo mode only)
When this check box is selected (default), photo resolutions
available for selection are in : ratio and you can use the entire
Viewfinder screen to frame your subject. When not selected,
photo resolutions available for selection are in standard : ratio.
Quality (photo mode only)
Select the quality level to use for capturing photos.
Self-timer (photo mode only)
If you need to take a self-portrait or group photo, you can set the
self-timer to either  or 10 seconds.
Geo-tag photos (photo mode only)
Select this check box when you want to store GPS location in
your captured photos.
Recording length (video mode only)
Set the maximum duration or file size for capturing video.
Record with audio (video mode only)
Select or clear the check box, depending on whether you want to
record audio when capturing videos.