99 Chapter 17 Photo InfoIf the Photo Info Palette is collapsed,click on the button to display itscontents. Both the Watch Point andHistogram sections contain Show/HideTriangles that can hide or expand thecontents of either section. By default,the Photo Info Palette displays theHistogram portion of the Photo InfoPalette.To hide or display either section, simplyclick on the button for that section.HistogramThe Histogram Palette displays a real-time updated histogram of the distri-bution of levels within the currentwindow.Each histogram represents a bar graphof the total number of pixels that appearat different levels of luminosity. Thehorizontal axis represents the luminositylevel, while the vertical axis representsthe number of pixels at each luminositylevel found within the current image.The left side of the horizontal axisrepresents the darkest tones within theimage, while the right side representsthe lightest tones within the image.You may choose a number of differentelements of the image to be displayedPhoto InfoThe Photo Info Palette provides you with a real-time display of important informa-tion about your image. Within the Photo Info display you have access to both alive histogram and Watch Points from the current image.
