Change the look and layout of the palette and shelf windows.
Automatically arrange the main, palette, and shelf windows
If the palette or shelf window is not open, and you want to include them in the layout, use the Windows menu to open them before proceeding.
If you move the windows, you can quickly return to this layout again by choosing Preferences > Interface > Palette/Shelves Layout (that is, the menu item itself, not the option box).