There are two options for playing a slideshow: previewing in the document window and playing in full-screen mode. If you have multiple displays connected to your computer, or if you have a projector connected to your Mac, you can choose any of those displays or the projector for a full-screen presentation.
To preview part of your slideshow, click on the Preview button in the toolbar (filled triangle), choosefrom the menu, or press the spacebar key.
If you want to stop the preview, click the Play button again, or choosefrom the menu, or press the Esc or the ⌘. keys.
To play the slideshow, first click on the Rewind button to move the playhead to the beginning of the slideshow, then click on the Play Fullscreen/Share button in the toolbar, then chooseor choose from the menu.
If there is more than one display device available (e.g. a projector connected to your MacBook Pro), a sheet will appear which lets you select which display should be used for full-screen playback. This sheet looks similar to the Displays pane in the System Preferences.
If you want to stop the slideshow, press the Esc or the ⌘. keys or click the Menu button on the Apple remote control.
The teleprompter helps you with live narration of your slideshow while presenting it in front of an audience. It displays the slide notes in a scrolling list on the second screen while presenting the slideshow itself on another screen or projector.
The teleprompter requires that at least two displays are available. One of these is usually a projector connected to your Mac. Since the teleprompter will be displayed in the document window, it will only be visible if you move the document window to the display which will not be used for the full-screen presentation. For example, if you have a projector connected to your MacBook Pro, move the document window to the internal display, and use the projector for the full-screen presentation.
Choosefrom the menu and in the sheet that appears select the presentation screen and 'Use Teleprompter' from the Options popup menu. Playback will start after the teleprompter has been prepared.
On the left side, the teleprompter displays the current slide, its duration, and a small progress bar which gives you an idea how long the current slide is still going to be visible. This is helpful to pace your live narration. The right side displays a scrolling list of slide notes, which remind you of what to talk about during the slideshow. The notes for the current slide are displayed in bright white, while notes for upcoming slides are displayed in a dimmed dark gray.
Slideshows can be controlled interactively while playing. This interactive control is available when previewing in a window, playing full-screen, or using a standalone player. Playback can be controlled interactively with the keyboard, the Apple remote control, or mouse clicks: