Switch to Polygon mode by clicking "polygon" in the bottom left or pressing "space" until it is highlighted. In the "surf" line, press the down arrow and choose the surface you wish to select. Use either the "Lasso" (right mouse button) or select by surface in the "statistics" panel. Use the "move" tool "t" to arrange the surface groups. Once they are arranged, use the "size" tool "H" found in the "stretch" section of the "Modify" tab. Hold the "CTRL" key to uniformly size the UV coordinates down to fit the UV Grid.