Viewing the slideshow on a full screen of the computer

[traveler]

I just purchase PS4 after using the trial version for several days. On the trial version I could view the slide show on the full screen of my computer by clicking on the "view full screen" button at the bottom of the screen. With the PS4 boxed software, I can only view it with the partial screen, the "view full screen" button is gone and the Theme Menu remains on the other part of the screen. How can I set it to show full screen? Please help!