How and why to reduce .PPTX file sizes
Large images in your .PPTX can reduce performance by hogging resources unnecessarily. For each 100MB of file size, you have to make about 500MB of RAM available.
Keep in mind that on a machine with 8GB of RAM and 'standard' programs pre-loaded (antivirus, display, printer and other device controllers), immediately after Windows is started, you're left with about 3.9GB of RAM.
Running Office alone/empty will 'cost' you another 1GB or more, so each presentation you open should be as small as possible.
Here's how you can achieve relatively small file sizes. Office 2013 and up actually offers built-in, user-friendly file management and optimization features.
For example, it lets you Compress Media (videos) automatically, or Optimize Compatibility within your presentation (available via the File menu in the top-left corner):
You can reduce your PowerPoint file by 50% or more by simply changing the resolution of your images:
Here's a little more from MS Office Support on how and why compressing media helps: Compress the media files in your presentation.
Click here for tips on how to reduce file size, or check out the attached .PPTX for a quick compression lesson.
Remember, there is virtually no file size limit in PowerPoint (and therefore EZ-VOTE), so the only limitations come from your PC's ability to deal with the resource requirements.
Compressing pictures and other hints listed in the above hyperlink will help to greatly reduce problematic file sizes.
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