How to lock margins to page orientation.

[JavierM-Xerox]

I've written a small tutorial to illustrate how to enable the imposition you are asking about: http://forum.support.xerox.com/t5/FreeFlow-Core/bd-p/FreeFlowCore

[Sg9090]

I have an impo which is set to impose automatically with page orientation and rows and columns, when i set left, right, top and bottom margins these remain fixed regardless of page orientation.

How can i fix these margins to the page orientation so the margins move with the page orientation.