By default mac os uses the native resolution of the

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By default, Mac OS uses the native resolution of the connected display. This is a very good thing.Remember, flat screen displays should always use their native resolution. If you don't, graphics and icons can look distorted or pixelated. So, for the most part, you should never have to change this setting. However, if you do need to change the resolution, what you do is select the scaled radio button.Doing so displays the available resolutions for the display. To change the resolution, all we have to do is select it, and the display will change but, let's switch the display back to default for display. Color Profiles 3:21-4:26 Over on the color tab, is where we can change the displays' color profile. This determines how colors will look on the display. Right now, we're only displaying the profiles that are for this particular display. If we wanted to select a different color profile, we have to clear this check box, and all the installed color profiles appear. We can toggle between the different color profiles if we want, and notice the color, contrast and brightness all change when we do. Some of these don't look good at all. In fact, if you ever have to troubleshoot a Mac system with color problems, this is a great place to start. Make sure the computer is using a profile that's made for the display. This tab is also where we can add custom color profiles, and calibrate the display settings. Doing this is more of an advanced feature for graphic designers and photo editors, but it's good to know where it's located. Now, I'm going to open up another system preferences window that shows some of the settingsunique to Mac OS laptop systems. Notice the display indicator here, shows that we're using a laptop display. We can also turn on and off the auto brightness setting feature. There's also this brightness bar here, that allows us to adjust the display's brightness. Setting up Multiple Displays 4:27-5:20 There's one more aspect of the display settings that we need to cover, and that's setting up and using multiple displays. When an external display is attached to a Mac system, the arrangement tab here will appear. This tab allows you to make the system reflect how the external display is arranged on your desk. For example, if the external display was on the left of our primary display, we could drag it over here like this and the change is made. Notice the white bar on this box here. This means this is our primary display that has the Apple menu bar on it. You can also select the option to mirror the display. This makes it so that instead of extending the desktop onto the external display, the desktop is instead mirrored on both. Another thing you should know about multiple displays in Mac OS, is the fact that when the display settings are opened, a display dialogue window will appear on both displays. This allows you to change things like the resolution and color for each display.
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