Template:Overlay

Usage

{{overlay
|image = Image
|width = Width of image
|height = Height of image
|grid = enable grid lines? [Yes/No]
|legend1title = Title of first legend
|overlay1 = Name 
|overlay1top = Height position of marker for overlay1 relative to image
|overlay1left = Width position of marker for overlay1 relative to image
}}
Further exploration and experimentation required to expand Overlay functions