In Photoshop elements which is similar there is an option under 'window' menu, for an 'info' screen you can toggle on and off.
That info screen shows both the RGB value and the x/y coordinate under the cursor.
Don't forget the y value is upside down compared to the RTW coordinates which start with 0,0 in bottom left hand corner instead of top left. Either flip the map over or remember to subtract y from total height.
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