Once you have imported the PDF to PPT and open the PPT, you may find that the images get blurry or less sharp than those in the original PDF file.
I clicked on output to send it to Premiere Elements 10 because my pictures were blurry/pixilated when I viewed them in full screen preview, but they were not blurry/pixilated in the screen above the timeline. Click on the “File” tab in your PowerPoint.