All analysis images are automatically fitted to the PowerPoint slide. For some analysis visualizations this will result in a very small image on the slide like for example the Combination analysis:
To get the original image you just need to right click on the analysis image on the slide. This will popup an action menu. Here you need to choose for Size and Position...:
When you've clicked the Size and Position... option, you will get a Format Picture popup:
Click the Reset button to reset the image on the slide to its original size. If you've done this correctly, you should get something like this: