The instructions will also work if you intend to connect an additional display to your laptop.
Typically, the computer will automatically recognize the second monitor after connecting. You just have to go into the OS settings and choose a convenient mode of operation with multiple screens.
If the new device does not appear in the settings menu, make sure that you correctly connected it to the computer and the power supply, and also do not forget about the power button.
If the monitor has several ports for receiving video data, you may have to manually activate the one through which you connected the computer. To do this, call up the screen menu using the hardware buttons and select the desired port in it: HDMI, VGA or another. Typically, monitors have one or two buttons, so you should find the right one without any problems. If necessary, you can see the instructions for your model.
How to set up 2 monitors in Windows
Open the screen options. In Windows 10, this menu is located under “Settings” → “System” → “Display”. In other versions of Windows, the location of the settings may vary. But in almost any system, they can also be opened through the control panel, or the context menu, by right-clicking on the desktop, or through a Windows search for “Screen”, “Display” or “Monitor”.
All displays connected to the computer appear in the settings menu as rectangles. Select one of the three desktop display modes below them.
1. Duplication of screens
In this mode, both monitors synchronously display the same image. But if one of them does not support the resolution of the second, then on the lower-resolution display the desktop will be reduced and black fields will appear.
Duplicating screens is convenient if you use them, for example, for presentations: one display for you, another for the audience.
2. Advanced desktop
By choosing a desktop extension, you will split it between the displays. Each of them will show only a fragment of the available area. You can choose which part of the desktop a particular display will display. To do this, you need to move the rectangles of the screens relative to each other.
This mode is used to improve multitasking. So, you can run different programs on each display and see them in front of you at the same time. It is very convenient if you need to work with several windows at once, which do not fit on one screen.
3. Using one of the connected displays
This mode leaves only the selected screen active, the second continues to work, but with the backlight turned off. This option is often used by laptop owners to work on a large external display instead of the built-in one. The external is left active, and the darkened built-in is slightly lowered along with the lid so as not to interfere with looking at the large monitor.
Combination Win + p allows you to switch between displays on the fly:
By choosing the appropriate mode, you can adjust the resolution of active displays and other familiar settings. After that, everything will be ready to go.
1. Advanced desktop
This mode on macOS works in much the same way as on Windows. The desktop is split between two screens, and you can freely distribute open windows between them. When the cursor goes beyond the boundaries of one display, it appears on another. To adjust which part of the desktop this or that screen displays, simply rearrange the rectangles relative to each other.
One of the displays in this mode is the main one and contains all the shortcuts. A white bar is displayed on its rectangle. To make another screen basic, drag the bar onto its rectangle.
2. Video replay
Video repeat is similar to the screen mirroring mode in Windows. When it is selected, the rectangles in the diagram merge into one and all displays show the same image. To activate this mode, check the box “Enable video repetition of monitors”.
When you select the desired mode, open the “Monitor” tab and, if necessary, adjust the resolution and other screen settings. After that you can get to work.
Closed Display Mode
In addition to the above, macOS supports a special closed display mode. With it, you can use the MacBook as a system unit with a closed cover.
This mode is activated automatically under the following conditions. The laptop should be charged and sleeping. In addition, a monitor must be connected to it, as well as a keyboard or mouse. If at the same time you press the button on the keyboard or mouse, the laptop wakes up, the external screen will work, and the built-in will remain off.
If you connect the keyboard or mouse via Bluetooth, then to use the closed display mode, you will need to allow wireless devices to wake the Mac from sleep mode. This can be done in the Bluetooth settings.
If you have not bought a monitor yet
Before buying, check that the monitor and the computer support the same signal transmission interface, be it HDMI, DVI, DisplayPort or another. This will help to avoid compatibility issues.
If you want to use a TV as a monitor, you will need Lifehacker's instructions for connecting.
Open the desktop context menu, click Properties, and then in the Properties: Screen window that opens, go to the Settings page.
In this window, you can set the screen resolution and number of colors.
Open the Color Quality drop-down list. This list may contain the following parameters:
- 16-bit color (65 thousand colors),
- 24-bit color (16 million colors),
- 32-bit color (more than 4 billion colors).
Depending on what kind of monitor and video card you have, you can choose one or another parameter. Naturally, you can set a 32-bit color if you have a good monitor and a good video card. At the same time, colors are transmitted more naturally, especially in games. 32-bit color rendering brings the perception of images closer to the color perception of the human eye.
Another very important parameter is the screen resolution. The higher the resolution, the more detailed the image, the better the video files will be played.
When choosing a monitor, however, as well as a TV, first of all, you need to choose its size. The minimum size of monitors today for cathode ray tubes (CRT) are 17-inch monitors. And 14 "and 15" is yesterday, replaced by 17 "come 19".
For liquid crystal monitors (LCDs), the monitor size is, for example, 17 "larger than for tubes, because the diagonal of the tubes is the size of the tube, and for LCD monitors it is the size of the visible part of the screen. Therefore, LCD monitors provide greater resolution.
For a monitor with a size of 14 "choose a resolution of 800x600,
17 "- 1024 x 728 or 1280 x 1024,
19 "- 1280 x 1024,
20 "- 1600 x 1200
After changing the screen mode, press the OK key. Within 15 seconds, the system will change the screen resolution, you can speed up this time by clicking the Yes button.
In the first figure there is a large number 1 and a small 2. This means that you can connect another monitor or TV. To adjust the resolution of the second monitor, click on the number 2, enter the resolution and check the box Extend the desktop on this monitor.
If the Use this device as the main checkbox is checked, the main Windows Start menu and the taskbar will go to the second monitor.