Since a RAW file is typically 2 to 6 times larger than a JPEG file and is not viewable in most photo viewer apps, a photo is captured in both DNG and JPG formats. When you use the HTC Gallery app, you'll see the JPG copy of the photo, with a icon to indicate that there is a DNG RAW file of that photo. RAW photos are not processed when captured to preserve most of the original image data—such as dynamic range—so you can adjust lighting or make professional adjustments using advanced editing tools.