If you have multiple monitors or an external device projections, you can set the corresponding Windows 10 built-in feature to change the active screen and how your current desktop is shared. 
The feature called View allows the user to customize their system to one of four options which are: main screen only, playback on an additional screen, extension on all screens or use only the second screen. Below we will see how you can set it up:
The Feature of Display in Windows 10 offers the following features:
Only on his screen computer
Only the main screen is turned on. All other connected screens will be inactive. Once you connect a wireless projector, this option changes its name to disconnect.
Reproduction
Plays the main screen on the second screen.
Extension
Your desktop will be extended to all the screens you've connected.
Only on the second screen
The main screen will be disabled. Use this option only to go to an external display.
You can choose the most appropriate method to access View Mode in Windows 10.
1. Easily and quickly with the Energy Center
The Action Center in Windows 10 is a special window that maintains various types of notifications and provides quick access to useful actions that can be performed with one click. By default, it has a quick action button called "View".
Click to select the desired function:
2. Using the Settings app as follows:
Open the Settings app
Go to System -> Display
On the right, and if you have installed a monitor in addition to the main one, you will see the option for multiple monitors. You can set from the dropdown menu your appropriate choice.
3. Using the DisplaySwitch.exe application
The built-in Windows utility, DisplaySwitch.exe, lets you specify which screen and how to use it. The application is in the C: \ Windows \ System32 folder.
You can use it through the command line, and create a shortcut for each of the available features. Tip: You can try these options from the Run dialog box. Open it by pressing the Win + R keys at the same time, and type the following command in the Run window.
DisplaySwitch.exe / internal
The internal switch indicates that your PC only uses the main screen.
DisplaySwitch.exe / external
Use this command to only go to an external display.
DisplaySwitch.exe / clone
Plays on the secondary display that it shows the main screen.
DisplaySwitch.exe / extend
Extends your desktop to the secondary screen.
You can get the above commands and create four shortcuts, one for each command.
Name them as you like and set the desired icon for each one.
4. Using hotkeys
In Windows 10, a shortcut key is available to immediately change the View mode. At the same time, press the Win + P (Greek or English) keys. This will immediately open the View Center of Action.
