With this app any image can be opened and placed freely positioned on the screen.
The transparency of the image can be adjusted from invisible to completely visible.
The picture is a layer on top of the screen and all other apps under the layer are still clickable.
So it is possible to take a new picture with the camera which is similar to the old picture or rather only one object changes and the remaining parts are the same.
Of course just a resized image can be placed anywhere on the screen and is always shown. To prevent that the toolbar takes place from screen it can be hidden.