Toggling Audio Skin and other options are hidden under the Ghost icon in the top left corner of the constellation. Turning on Audio Skin will give every sound a more unique color as well, compared to the regular view. The next option to toggle is Audio Ghosts. If toggled on, all sounds that are currently not editable are displayed by a greyed-out cross. The Pre and Post options of the Audio Skin menu are sliders for you to determine how many sounds you want to display before the selected sound, and after the selected sound.