Does PPT efficiently manage images?

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phillr - 11 Apr 2008 14:57 GMT

I'm curious as to how PPT manages images that I include in my presentation.
Example:

1) I have a template with a background image. All of my slides are based off
of the template. If the image is 100 kb, and I have 20 slides, is my PPT
going to be 20 MB+? Or does PPT somehow organize a single internal reference
to the image, thus making a PPT 100 kb?

2) Compare to this: Instead of using a template, I manually (yes yes) put
the background image into every single slide. How big would the file size be?

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TAJ Simmons - 11 Apr 2008 16:36 GMT

1) If the image is 100 kb, and I have 20 slides, is my PPT going to be 20
MB+?

No. The the 100kb only gets counted once

2) Compare to this: Instead of using a template, I manually (yes yes) put
the background image into every single slide. How big would the file size
be?

Powerpoint is actually very clever in that it would 'know' that the image is
the same and it would only take up an extra 100kb for an 100kb image (plus a
few kb for the info to know the image is required on each page).

Try a test - you'll be surprised at the results

cheers

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TAJ Simmons
Microsoft Powerpoint MVP

http://www.awesomebackgrounds.com
awesome - powerpoint templates,
powerpoint backgrounds, free samples, ppt tutorials...

> I'm curious as to how PPT manages images that I include in my
> presentation.
[quoted text clipped - 10 lines]
> the background image into every single slide. How big would the file size
> be?

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Cyndical - 11 Apr 2008 23:07 GMT

> No. The the 100kb only gets counted once

TAJ is right. Older versions of PowerPoint (like V4 on the Mac) would count
each instance of a photo as a whole new photo and increase the file size,
unless it was on the master. For example, having it on the master = 200K,
taking a copy of that and pasting it onto a slide = 400K. Newer versions of
PowerPoint, duplicating a photo just seems to register as a "ditto".

You must keep in mind, though, that if you don't turn off "Allow Fast Saves"
in your Options, your file will increase in size but it won't be because of
the photos!

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