Friday, November 22, 2019

Changing the Image Export Size from PowerPoint for Office 365

I am working on a new YouTube channel called InfoSciShow™. I'm really excited about making these videos and have several in the works for launch this month. Please subscribe to my channel!!! I promise you won't be disappointed.

So as I'm building my visuals in PowerPoint, I did a test export of my custom thumbnail slide. There were no options for changing the size of the exported image. The resulting image is 1280x720 for both PNG and JPG exports. Not exactly 4K! Note: I was using the standard 16x9 slide size of 13.333" x 7.5".

No, the "More options..." doesn't give you this option, though it does let you add metadata.

So how do you change the resolution of slides exported as images from PowerPoint? I'm using the latest release of PowerPoint for Office 365 on Windows 10.

Turns out you have to edit the Registry. WHAT?!? It's 2019, right? With all the great features in PowerPoint, why is there no option in the app for changing this value? You can even export presentations as a 4K video, but not a slide. 🤔

While I'm on this topic, the Microsoft Doc called "How to change the export resolution of a PowerPoint slide" uses the term DPI when it means PPI. Yes, I know this is nitpicking and they effectively mean the same thing. But DPI (Dots Per Inch) is a physical print term. PPI (Pixels Per Inch) is the proper term for anything digital, including scanner settings from physical to digital. (This will probably be covered very briefly in one of my videos...)

So, I'm off to hack my registry.

If you know a better way, please leave me a comment!


If you want to set PowerPoint 2019/Office 365 to export slides as images at 4K (3840 x 2160), do the following—at your own risk!

You will need a PPI (DPI) number for the registry edit. What number?
  • If your slide size is the standard 13.333" x 7.5" (16x9), PPI needs to equal 288.
  • If your slide size is custom, e.g., if use are using a custom template, and is 26.667" x 15" (16x9), PPI needs to equal 144.

Go to this part of the registry:
Once there,
  • Add a DWORD value.
  • Name it "ExportBitmapResolution".
  • Change it to decimal.
  • Set the numeric value.

Yes, that's a setting of 288 "DPI" for the standard slide size for 16x9 aspect ratio. I figured out the math based on the examples in the above linked article. The registry will convert this to a hexadecimal value of 120 (FYI).

You should close PowerPoint before this and relaunch it after the change. BE CAREFUL in your registry, and don't come to me if you mess it up.

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