From the Shape Sculpt section of the action bar, click Face Subdivision
.
You can also access this command by pressing
ALT+SHIFT+D.
Select the surface to be subdivided.
A slider appears at the
right of the screen to let you define the ratio between 0.1 and 0.9.
Drag the slider to the desired ratio.
You can also click in the slider
to open the Subdivision Ratio dialog box and define the ratio
between 0.1 and 0.9. The box dynamically updates whenever you move the
slider and vice-versa.
Click to subdivide a face.
Press Ctrl to add elements and subdivide the
selection.
Tip:
You can also add elements by pressing
Shift and drawing a trap.
Release the pointer when you are satisfied with the new topology of the
surface.