A hierarchical differential document is produced to report changes between a first and a second version of a hierarchical document. The method includes supplying at least two stock grades to a multilayer flow box, winding up the tissue web on a reel of a reel-up, and influencing the hardness of the reel produced in a predefinable way. The magnetoresistive sensor also includes a second elongated free layer having a second quiescent state magnetization direction and positioned such that the first quiescent state magnetization direction is generally orthogonal to the second quiescent state magnetization direction. When so suspended, the panels are in partially opened positions with respect to each other so that the first panel can function as a desk, computer support or a head rest.