When I was very satisfied with the export of my PPT, I found that whether I use Office2016 or Office2010 to open, it is a lot different from the picture I edited on Gamma, the quality of the picture decreases, especially the background, when I download a PPT, I found that it is very cool to display on Gamma, and it becomes very ordinary after exporting, I clicked on the display background option, but the background display degree is still not up to it