Uhhh? Idk.
I don't even know how to zoom in or zoom out.
But I'm just previewing any model data I find to see if this works.
I think my graphics card just suckss.
So you're previewing any old model data?
Also, to zoom in and out, use the scroll on your mouse and you can use hold shift while doing it to make it faster (doesn't really help w/ models)