Default PowerPoint Compression = BAD
There is a bad habit of PowerPoint to compress all images by default! Yes, you read correct. The great presentation tool PowerPoint is adjusting your images by default to a low-quality resolution to save space on your hard drive. That was important, years ago when storage was limited and expensive. But now, when you use PowerPoint presentations on large television screens for your advertising and information screens, you need high-quality or high-resolution images.
By default, PowerPoint is compressing images with a 96 PPI resolution. PPI stands for Pixels Per Inch, and a value of 96 is low quality. A higher value here would result in a better image quality. There are 2 ways to make sure that you use (and remain to use) high-quality pictures.
Method 1: Per Presentation
The first method is an option that you can change for the current presentation. I can tell you already that the disadvantage of this option, is that you have to apply this setting again for every new presentation, and you will forget that.
To change the default picture compression for the current presentation, click File, Options, Advanced.
So this works fine for this presentation, but you will probably forget to do this change for the next presentations. There is another option to make it change permanently.
Method 2: Permanent higher resolution
To make this permanent, we have to enter some information into the registry. To fastest way to open the registry editor, is to click the Windows key + R on your keyboard. There you type in the word regedit and hit OK.
Here is another great tip for PowerPoint when you want to export your slides to high-quality JPG images.