Viewing a Presentation on an External Display or Projector
There are two ways to use a second screen when presenting your slideshow:
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Video mirroring displays the slideshow identically on both screens.
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Dual displays allow you to show presenter information or prompts—for example,
your slide notes, a preview of the next slide, and a timer—on one screen, while
viewers see only the slideshow on the other.
Some notebook computers have video mirroring built in. If yours doesn’t, you must
configure it. Other notebook computers may not support video mirroring at all.
To view a presentation using a dual-display configuration:
1
Connect the second display or projector according to the instructions that came with
the display or projector and the instructions that came with your computer.
See “Tips for Using an External Display” on page 206 for some setup recommendations.
2
Choose Apple menu > System Preferences, and then click Displays.
3
Click Arrangement and follow the onscreen instructions.
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If there is no Arrange button, your computer doesn’t detect the second display.
4
Make sure Mirror Displays is not selected.
5
Choose Keynote > Preferences and then click Slideshow.
Choose where slides
display during a slideshow
with a dual-display setup.
6
Select “Present on primary display” or “Present on secondary display.”
The primary display is the one on which you see the menu bar. If you choose “Present
on secondary display,” you can customize what the presenter sees on the primary
display. See “Customizing the Presenter Display” on page 208.
7
Click Play in the toolbar.
8
Advance through the presentation by clicking the mouse or pressing the Space bar.
See “Controlling a Presentation with the Keyboard” on page 210 for other options.
To view a presentation using video mirroring:
1
Attach the second display or projector according to the instructions that came with
the display or projector and the instructions that came with your computer.
See “Tips for Using an External Display” on page 206 for setup recommendations.
2
Choose Apple menu > System Preferences, and then click Displays.
3
Choose a resolution and number of colors.
Use the same settings for both displays.
4
Click Arrange and select Mirror Displays.
5
Open the Keynote document and click Play in the toolbar (or choose
Play > Play Slideshow).
To advance to the next slide or object build, press the Space bar or click the mouse.
6
If you see stuttering during playback, you may need to change the screen refresh rate.
Keynote generally plays back very smooth animations. However, if the two displays
have different refresh rates, one of the screens may appear to “stutter” because
Keynote synchronizes with the refresh rate of only one display. If you’re using Keynote
on an iBook, PowerBook, MacBook, MacBook Pro, or MacBook Air with Mac OS X
version 10.3.9 or later, Keynote synchronizes with the external display.
To change the screen refresh rate:
1
Choose Apple menu > System Preferences, and then click Displays.
2
Choose Display and then choose an option from the Refresh Rate pop-up menu.
To get the best animation quality, use the external display’s preferred screen refresh
rate. You can probably find this information in the display’s documentation. If not, try
different refresh rates to see which results in the best animation quality. Most liquid-
crystal display (LCD) screens have an internal refresh rate of 60 Hz. Most CRT devices
don’t have one optimal refresh rate.
If you’re using a desktop computer and two displays, experiment to determine which
display is synchronized with Keynote.
Tips for Using an External Display
You can play your Keynote slideshow on various kinds of projectors and
external displays.
Here are ways to get the best video quality in your presentation:
If you have a choice between a DVI connector and a VGA connector, use a DVI
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connector to connect the projector. DVI connections generally result in the best image
quality and are easier to set up.
Select the native
screen resolution.
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Set the native screen resolution (the size of the image on the screen) in the Displays
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pane of System Preferences. Look for this information in the documentation that came
with the display. For most projectors, the preferred screen resolution is 800 x 600 or
1024 x 768. Most liquid-crystal display (LCD) and Digital Light Processing (DLP) screens
work with a variety of resolutions, but one is the preferred setting.
To change your computer’s screen resolution, choose Apple menu > System
Preferences, click Displays, click Display, and then select the resolution you want from
the Resolutions list.
Set the screen refresh rate (the number of times per second that images are updated
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on your screen) in the Displays pane of System Preferences. If you use an LCD display,
LCD projector, or DLP projector, try to match the refresh rate of your computer or video
card with the optimal refresh rate of the display device. (Usually this is an issue only
if you’re using a VGA-style connection to an LCD or DLP display. CRT devices do not
typically have one optimal refresh rate.)
If the colors on your display seem “washed out” when you connect to a new projector
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or if the text appears jagged, you may need to calibrate your display. Open ColorSync
Utility (in the Utilities folder in the Applications folder on your hard disk) to set up
color calibration.
If you’re set up to use a dual-display configuration and you want to switch the Presenter
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Display to the other screen during your slideshow, press X to toggle the displays.