How do I save a photo as a wallpaper/screensaver on my HTC Vivid?

[AC Question]

Saving Photo as wallpaper/screensaver on HTC Vivid-Need Help please

I have an HTC Vivid. I save a picture from my Gallery and Google Photos as my wallpaper, but it keeps reverting back to a screen saver/wallpaper i do not want. How do I stop this from happening? The wallpaper/screensaver that it keeps reverting back to is one that came with the phone.