There are a few ways to switch users on PlayStation 4. One way is to use the PlayStation 4’s “User Interface” (UI). The UI can be found in the top left corner of the screen. To change users, you need to open the UI and select “User Profile” from the list of options. Then, you need to select “Switch Users.” After you’ve selected this option, you will see a list of users that are currently playing on your PlayStation 4. You can then select one of these users and they will be switched on.