I'm new to using the Mac. I'm a photographer, use a MacBook and recently purchased a Mac monitor (discontinued, bought it second-hand) to connect to my MacBook as a second monitor for my photo editing, lightroom, photoshop etc.
On this site I learned how to adjust brightness on the second monitor
(Control + F1, F2) but I need to know how to match all monitor settings in the two monitors, such as contrast, colour saturation and so on.
At the moment my photos look slightly different on each screen. With my MacBook setting being the the one I wish to duplicate on the second monitor.