This type of placement allow you to remap a quad defined inside an image to a quad defined in Smode space.
To do that first click on "edit on" button in the visualizer, uncheck Enable
inside the parameters and click on Reset Input
Then you need to define put the 4 key-points of the image on the input image.
Once finished check Enable
and click on Reset Output
You can now place the output quad as you wish in the visualizer.