See it in action here:
Extension URL (for importing into your own projects): https://github.com/robo-technical-group/pxt-arcade-display-strings.git
API documentation is available here: https://github.com/robo-technical-group/pxt-arcade-display-strings/blob/master/api.md
 Use IntelliSense to learn about the
Image.printCenter functions that are built into MakeCode Arcade.