Screens and scenes are two different things, scene is to show the scene and screen is something you use for various other reasons that you either use call or show in the script, usually for a map or image buttons and the likes.
To show the scene you don't use the word show, you just use scene name_of_image
There is no hide scene as show scene erases the last scene.
You can use show "image.png" and then you need to hide "image.png" but you really only do that bring a smaller image into your scene as it does not erase anything.