Google ANDROID Quick Start Guide (4.4, KitKat) - Manual (Page 43)

ANDROID QUICK START GUIDE TRY SOME APPS 39
Panorama
To take a panoramic photo, touch the blue shutter
button, slowly pan across the scene and touch the
button again to stop.
Photo Sphere
To capture a 360-degree or wide angle shot, pan or tilt
until the circle in the centre of the screen moves over
a white dot and records that portion of the image.
Keep moving over the dots until you've finished and
then touch the shutter button to finalise.
To change camera settings such as flash, exposure and so on,
touch the circle to the right of the shutter.
NEXUS 5 TIP: HDR+ on Nexus 5 automatically snaps a
rapid burst of photos and combines them to give you the
best possible single shot. Daytime shots are vivid with
clean shadows and night time shots are sharp with less
noise.
To turn on HDR+, touch the circle to the right of the
shutter, then HDR+.
For more details, visit Camera & Gallery help .