Samsung Digital Camera User Manual (en)

Extended functions
Using the DUAL IS mode
Reduce camera shake and prevent blurred photos with Optical and Digital Image Stabilization functions.  
Before correction
After correction
Rotate the mode dial to 
Align your subject in the frame and half-press [Shutter
to focus.
Press [Shutter] to take the photo.
The digital zoom will not work in this mode.
The photo will be corrected optically only when taken with a light 
source that is brighter than fluorescent light.
If your subject is moving rapidly, the photo may be blurry.
Set the Optical Image Stabilization option to reduce camera shake in 
different shooting modes. (p. 30)