Stabilize
Similar to the electronic stabilization in digital camcorders, this tool minimizes shake and jitter caused by inadvertent camera movement. When using this effect, the outer areas of the image are removed and a varying portion of the image is enlarged up to 20 percent in order to fill the frame.
After Stabilize has been applied, the video must be rendered to preview accurately. Instead of using the Play control on the toolbar, click the Render & Play button on the Stabilize panel to preview.