by AJ George 
You may not realize it but PowerPoint is lowering the quality of the images in your presentations. How? By default, PowerPoint is set to compress the images in your files. In most cases compressing the images is a good idea because smaller images mean smaller overall presentations. In some cases however, you may wish to maximize the image quality. For example, if the focus of your presentation is a collection of photographs, the loss of quality due to the compression is problematic.
Here is how to turn off picture compression:
- In PowerPoint, choose File > Options to open the PowerPoint Options dialog box.
- Select the Advanced category.
- From the Image Size and Quality area, choose the presentation that you don't want PowerPoint to compress from the drop-down menu.
- Select Do not compress images in file.
- Click the OK button.
***
Having a problem getting PowerPoint to behave? Email your issue. I may be able to help and then share the solution here.