Setting the Slide Size
For highest-quality playback, your slide size should match the screen resolution of the
display on which the slideshow will appear. Most projectors work best with slides at
800 x 600. Newer projectors may display slides at a resolution of 1024 x 768 or higher.
If your presentation includes movies, you might want to use a higher resolution. In
this case, choose a high-definition (HD) theme with a resolution of 1920 x 1080 (not
all themes offer the higher resolution). Higher resolution requires more memory and a
You can change the slide size of a Keynote document in the Document pane of the
Document inspector. If you’re not sure of the best slide size or you don’t want to
change the original slide size in your document, Keynote plays the slideshow at its
original size, centered on your display and surrounded by a black border. If a slide is
too large to fit the display, Keynote automatically scales it down to fit the screen.
You can also have Keynote scale the slideshow up to fit your screen when the
To scale a slideshow up during playback:
Choose Keynote > Preferences.
Select “Scale slides up to fit display.”
This option does not actually change the slide size of your Keynote document; it scales
the document to fit the display. Some video quality may be lost during playback with
If you use the Cube or Flip transition, you may want to select “Reduce Flip transitions
to avoid clipping” or “Reduce Cube transitions to avoid clipping.” Otherwise, part of the
transition may not be visible.