Apple Keynote '09 - Manual (Page 111)

Chapter 6 Adding Sound and Movies 111
When your movie plays during your slideshow, playback controls appear when you
move the pointer over the movie. To learn more about controlling the playback of your
audio or movie during your presentation, see “Playing Movies” on page 213.
Reducing the Size of Media Files
Including large sound and movie files to your Keynote document can make the entire
document file size very large. If you’re using only a portion of the sound or movie file
in your slideshow, you can remove the unused portions of the audio or video file to
make the Keynote document file smaller. You can choose either to reduce the size of
individual media files or to reduce the size of all the media files in the document that
are not being used in full (including masked or resized image files).
Before you reduce the movie or audio files, you must save them as part of your
document. For details about how to do this, see “Saving a Presentation” on page 31.
To reduce the file size of your document, do either of the following:
m To reduce the size of an individual file in your document, select a sound or movie file for
which you have set the Start and Stop sliders to exclude some part of the file, or an
image file that you have masked or resized to a smaller size, and then choose Format >
Image > Reduce Media File Size.
m To reduce the size of all the media files in your document, make sure no sound, movie, or
image file is selected, and then choose File > Reduce File Size.
After reducing the size of your sound or video file, you won’t be able to restore the
file to its original length or listen to or view the parts that you have excluded. If you’ve
reduced the size of a masked or resized image file, you won’t be able to restore the
image to a larger size without losing some image quality.
If you change your mind and later want to restore the entire file, you must add the file
to your slide again.
Some types of movie files may not be reducible in this way.