HTC ONE User Manual page 165

Use the controls on the Viewfinder screen to add effects, zoom in or out, and more.
Note: After using Camera (or if you temporarily leave the Viewfinder screen), you still need to
unlock the phone if you have a screen lock.
Zooming
● Before taking a photo or video, slide your finger on the zoom bar
out.
● When you're recording video, the zoom bar is always onscreen. You can freely zoom in
or out while recording.
Switch Between the Front and Main Camera
1. On the Viewfinder screen, touch
2. Touch Camera.
3. Touch either Front or Main.
Note: Some camera features are not available when you're using the front camera, such as
zooming and face detection.
Add Effects
Use the available camera effects to make your photos look as if they've been taken through
special lenses and filters. You can also apply certain effects to videos.
Choose an effect before taking a photo or video.
1. On the Viewfinder screen, touch
2. Scroll through the available effects and touch one that you like.
Tip: When you choose certain photo effects such as depth of field, distortion, or vignette,
drag the bar that appears on the screen to adjust the intensity of the effect.
Camera and Video
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to zoom in or