If you’re a Fortnite player, then you know that using the mouse and keyboard is essential to playing the game. In this guide, we’ll show you how to use the mouse and keyboard on PS4 Fortnite. First, open up your PlayStation 4’s settings and select “Input.” Under “Input,” select “Mouse.” Next, under “Device,” select “PS4.” Finally, under “Type of Input,” select “Mouse & Keyboard.” Now that you’ve set up your input device, it’s time to start playing! To play Fortnite, use the left arrow key to move around and the right arrow key to fire weapons.