Palettes help you monitor and modify images. By default, they appear in stacked groups. To show or hide a palette as you work, choose the appropriate Window > [palette name]. A checkmark by a palette name on the Window menu indicates that the palette is shown now in the front of its palette group. No checkmark means that the palette is either closed or hidden behind another palette in its palette group.
You can reorganize your work space in various ways. Experiment with several techniques: