How to change the lock screen background picture that we explain now here:
Navigate to this page:
1. Menu -> Settings -> Wallpapers
2. Now choose the top left "lock screen" from.
3. Now select the image from the Gallery or the pre-made images of Android
4. Adjust the image cutout
5. Take over the current photo as wallpaper for the lock screen of your Samsung Galaxy S6 EdgePlus
You have just successfully changed the picture of lockscreens.