Once your script is ready to go, enter the Presentation screen to use the teleprompter. 

You have the option to change the text alignment, text size, and Flow mode. You'll also see the other available features such as Mirroring, Remote mode, Overlay and Restart.

There are a couple of ways to start the teleprompter. The most obvious is clicking the "Start" button in the bottom right-hand corner.

You can also click on a word to set that word as the starting point.

or simply press the Spacebar key on your keyboard as a shortcut, if you're using one. 

Press the "Stop" button in the bottom left corner (the same button used to start it), or press the "Spacebar" key