In the Full Edit workspace, the Info palette displays file information about an image and also provides feedback as you use a tool. Make sure the Info palette is visible in your work area if you want to view information while dragging in the image.
To change the mode of color values displayed,
click an eyedropper icon in the
Info palette, and choose a color mode from the pop‑up menu. You
can also choose Palette Options from the More menu in the Info palette,
then choose a color mode for First Color Readout and/or Second Color
Readout:
To change the unit of measurement displayed, click
the cross hair in
the Info palette, and choose a unit of measurement from the pop‑up
menu. You can also choose Palette Options from the More menu in
the Info palette. Choose a unit of measurement from the Ruler Units
menu, and click OK.