Rotate the image by dragging anywhere outside the crop marquee. Add perspective to the cropped region by first enabling the Perspective option in the Options palette and then dragging any corner node. Toggle between the Magnetic and Freeform Pen tools by holding down the Alt key. A black outline indicates the active color well. For example, if the foreground color is the active color well, press the Alt key to select a color for the background, and vice versa.
White dividers indicate linear states and black dividers indicate non-linear states.