Hi,
uhm, I am not sure there is a way to do that easily. what I would do is try to set up a guilayout area with an offset so that it starts way above your anchor point, and then in your layoutm, you would have a vertical layout with first a flexible space and then your content. in effect you would have a space that starts way above your anchor point, but all constraints to start from the bottom because of the flexible space.
does that make sense?
bye,
Jean