It depends on what kind of rossette you are using. Assume you are using a edge wise rossette, and you used three tangential lines to define the edge that is supposed to be used, then you try to modify the geometry. This modification can cause a change in the number of lines you defined to be used as the edge in edge rosette. Sometimes, a change in the geometry can cause that line to be completely gone and you would then encounter an error depicting that 'there is no edge defined' or something like this. If you instead used a parallel, then the initial input orientation for the parallel will be used through out the parametric analysis and will not change depending on geometry; however the point (or origin) which you picked on the geometry to define the parallel rossette can translate depending on the change on geometry, or maybe not. i.e. the location of point might remain constant, or you might even need to input the location of point to define the parallel rossette again for each of the parametric analysis. Same thing applies to all of the rossette techniques like radial, cyclinderical or spherical. A study on this would be an efficient way to check what actually happens to the rosette appointed location and directions. And by study, I mean that after the parametric analysis is complete, select a design point as current, then go back to the ACP Pre to see what happens to the rossette origin and direction.nAs far as the OSS is concerned, the OSS location might also or not move depending on the change in geometry. However, the direction of ply layup will not change since they depend on the surface normals and the mesh elements normal. If you didn't change the surface normals in the design moduler, then I reckon the direction of ply layup will remain the same.nFor the last question which you asked, select the area in the 'Model', create a named selection and then it would appear as a separate region under 'Elements' in the ACP Pre.n