We examined the free surface as well as the substrate-film interface of thermally equilibrated block copolymer films forming stacks of glassy-rubbery lamellae and having quantized film thickness due to terrace formation. Upon reversing onto a new substrate, similar to 100 nm thick floated films deform without loss of the film integrity, so that the characteristic macroscale topographic pattern is transmitted to the newly formed free surface. The adhesion-driven deformation is attributed to a local shear of the step regions in order to adjust the surface relief structures to the flat substrate geometry. Further, the polystyrene sheet at the film-substrate interface exhibits a heterogeneous phase structure which we assign to a partial autophobic dewetting. Stepwise erosion and reconstruction of the inner structure of the film disclosed a precise connection of the alternating wetting conditions at the substrate with the surface topography of the top layer. Apart from unveiling an adaptive mechanical behavior of nanostructured polymer films under confinement, observations reported here can be used for designing superimposed topographic structures by controlling the wetting at the substrate as well as allowing better prediction of possible mechanisms of structure formation and pattern transfer on chemically patterned surfaces.