UCUpaint - noise settings?

Hi,

UCU paint allows to create a noise image
but where are all the noise settings ?

image

I tried creating a noise layer, same problem

image

I can create a noise texture in the shader, but how can I inject it for a particular layer ?

thanks for your help

[edit]

in my case I can use it as a base layer, but how could I use the same noise texture on the nth layer in the stack ?