What does the param "axis" do in Scale Layer

[Buggiant]

I understand that Scale Layer works as z = x * y where y is "broadcasted" to match the shape of x.

Here is my question:

I have bottom[0] as N*C*H*W, with bottom[1] as N*1*H*W,

and I want to tile bottom[1] to N*C*H*W, then computing the elementwise product.

How should I set the parameters, especially "axis"?

Thx a lot.