How to change the default Windows 10 wallpaper pack to only show one image at a time?

[Windows Central Question]

I just upgraded to Windows 10, and I was really looking forward to some of the new wallpapers that come preinstalled. To get to them, I am using Cortana to go into the classic control panel page to see all of the themes, where the Windows 10 theme is there. When I select the Windows 10 theme, it then displays all of the wallpapers in that theme, when I only want one.
Do you know of any way to select just one image for my background in the default themes that come in Windows 10?
Thanks!