imagePosition
type: Stringdefault: ‘center’
Positions the main image inside the stage container. Works like the CSS background-position property, f.ex ‘top right’ or ‘20% 100%’. You can use keywords, percents or pixels. The first value is the horizontal position and the second is the vertical.
Read more about positioning at http://www.w3.org/TR/REC-CSS1/#background-position