Double-clicking the double-arrows on the upper-right corner of the Tool box will change the orientation from one-row-of-tools-vertically arranged, to two-rows-vertically arranged. InDesign does this as well, with the addition of a third way, one-row-of-tools arranged horizontally. This is by far the most useful way in my opinion and I really wish Illustrator and perhaps Photoshop too, had the same option.