A palette with controls for changing the size, pixel aspect ratio, duration, frame rate, preserve options, motion blur, and renderer of the selected compositions, and all nested compositions (pre-comp layers) in it. When you lengthen the composition's duration, all layers whose out points are at or beyond the end of the composition are also lengthened to the new duration, including layers within pre-comps. You also have the option to change all layers to 2D or 3D.