Say that I create an effect that doesnt make use of a Geo node.
So I combine texture tops with displaces, blurs, transforms, etc, etc, and produce a nice effect,
and say that now I want to zoom the whole scene. I cannot because Im not using a render node, so I cannot have a camera, so I cannot zoom; what would be the trick to zoom for example the scene in such a case? thank you 
I see that maybe one way is just to use that final top output as the texture map of a constant material that is applied to a different geo node that goes to the same render, and I guess this could be the way
The transform TOP has scale x and y parameters that you can also use.
This zooms into the texture, so you do loose some fidelity in this process.
Another approach would be create a texture that’s larger than your final output, then use a crop TOP to crop into a smaller region of interest.
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@raganmd thank you Matthew, great point about the transform node, that would be the easiest solution yes, awesome,
in the end I used the output as map for a constant material and that way I could mix it with other geo nodes in 3d space and it works great, but I didnt have to mix it with other 3d stuff then the transform node would definitely be the easiest thing, thank you