I am VERY new to this technology. I am simply trying to make a picture slideshow for my dad's 70th birthday this weekend. I'm using Vegas Movie Studio 16 Suite. I have over 1000 photos uploaded to the slideshow section and I have music uploaded to play with the pictures. The problem is that when I preview the video, my pictures all appear pixelated. I tried a few online slideshow websites before buying the Vegas software, and these pictures all appeared to look fine. But when I view them in the Vegas Movie Studio 16 Suite, they all look pixelated. How can I clean them up?