[quote="toralord":12ogo6s9]use the sprite z elevation to make the sprite look big.
It is what you are looking for.[/quote:12ogo6s9]
I'm not convinced it's what he's looking for, since Z elevation works relative to the viewport. If you simply want to zoom a sprite you actually should go about it differently.
Apart from using events to resize your sprite according to its aspect ratio or messing with layers and zoom, you could also give the Scale Behavior