PowerPoint - File Very Slow

I have a pptx that i created on a MAC.  The total file size is 15MB and it consists of 5 slides.  When editing or changing slides in a slide show the file functions very slow.  As a test I created a new 3 page powerpoint with minimal images and it was much faster.  Is there any way to optimize the pptx so if performs better?  I need to show this powerpoint to a customer.
deklinmAsked:
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Echo_SCommented:
Do you have images in the file? What file type are they? (PNG, JPG, etc.) Are they bigger (pixel-wise) than they need to be?

I've seen reports of images on the slide master causing this type of lag on occasion. If you optimize those images in particular, does it perform better?

Printer drivers (believe it or not) can sometimes affect display, also.

Actually...which version of PPT are you using where it's displaying slowly?
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Ingeborg Hawighorst (Microsoft MVP / EE MVE)Microsoft MVP ExcelCommented:
Hello,

what do the five slides contain? Do you have high resolution images in original size, scaled down? If so, reduce the size of the images by scaling them down before you insert them into the presentation. That will bring down the PPTX file size dramatically.

For example: I inserted a 2MB image into a PPTX. The file size of the PPTX was 442 kb.

I inserted a 68kb image into another PPTX. It's the same image, but scaled down. It shows in exactly the same size and quality as in the first PPTX. The file size of the second PPTX was 100 kb.

cheers, teylyn
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Ingeborg Hawighorst (Microsoft MVP / EE MVE)Microsoft MVP ExcelCommented:
By the way, I was using PPT 2010 for windows. Using the "Compress image" command did not change the file size of the first PPTX at all.

cheers, teylyn
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deklinmAuthor Commented:
there are 8 - 12 images per page.  They are JPG & BMP file types.  Is my only solution resizing the images with a photo editing software (photoshop)?
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Echo_SCommented:
First try cutting the BMP, then paste special and paste it as a PNG or JPG.

You can use PPT's compression tool, but I find NXPowerLite to be much more effective. It's what I'd use were I in your shoes. www.nxpowerlite.com 

With PPT's compression tool, you may need to specify the PPI to size to. If it doesn't work from within the tool, try PPT Options | Advanced. There's an option in there to save the file at XYZ resolution. Choose 96.

Again, though, what version of PPT are you using?
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