How to changed the lock screen wallpaper on my Samsung J7

[Android Central Question]

I need info on changing the freaking LOCK SCREEN wallpaper, the image you see when you look at the Clock/time before you swipe. Not the regular wallpaper where my apps are. You would think this would be a simple thing to do, but I have spent a long time messing with it. The closest I came was changing it to some of the available images android offers, but I have an image in my gallery that I would like to use. I was able to do exactly that in the past, so I know it works. Just dont know how the heck I managed it. I also went on numerous forums trying to figure it out but nobody has been able to crack it. Please make sure you know the answer before posting. Because I am pretty sure whatever you think is the answer, isn't going to work.

 

[Samsung j7pro j730g]

On my j7pro its like this....
Hold down on the home page screen, select "wallpapers "
Select wallpaper you wish from available selection or from your images.
When you select your wallpaper there will be a pop up from the bottom of the screen allowing you to select where to assign that wallpaper, 1)home screen 2)lock screen 3)home and lock screen.