This feature will subdivide the selected faces without smoothing them so that you can add more detail to an entire mesh or to a local area.
First, select faces, groups, or components to be subdivided. Then click the subdivide button to apply one level of subdivision.
More iterations can be applied by repeatedly clicking the subdivide button.
The faces adjacent to the selected faces will automatically be split as well in order to maintain clean editable geometry.
In the image below, the top portion was selected and the subdivide button was clicked two times resulting in two subdivision iterations for the selected faces.