You'll also notice an Information button in the top-right corner. When clicked, a text box containing instructions for this slide appears, and when clicked again, it disappears.

Click the slide show button on the bottom right of the PowerPoint interface. Then the slide show will appear. You can also press Alt-F5 to start a presentation.

Click the Slide Show button. Launch PowerPoint. On the Home tab in the Shapes Gallery, select the text box and draw it onto the slide. Enter text into the text box.