The Info Palette

The eyedropper can be used in conjunction with the Info palette to read color values from your images. Display the info palette, then select the eyedropper and move it over your image. By default, the Info palette displays the RGB and CMYK values, as well as the X and Y coordinates of the cursor. When making a selection, the Info palette also displays the width and height of the selection. By default, the Info palette also shows Document sizes and Tool hints.