Go to Start , then select Settings > Ease of Access > Keyboard, and turn on the toggle under Use the On-Screen Keyboard. A keyboard that can be used to move around the screen and enter text will appear on the screen. The keyboard will remain on the screen until you close it.
How do I get the keyboard on my screen?
On the main remote control screen, tap the Keyboard icon. Tip: On devices supporting three-finger swipe, make a three-finger swipe up/down to show/hide the keyboard. Result: The onscreen keyboard is displayed. Tap the screen where you want to begin typing.