Please allow us to change 2D extents of pinned sections without first having to unpin the section. It should work just like pinned grids, which allow you to change 2D extents but not 3D extents. Currently you have to unpin the section to change its 2D extents; in 50% of cases the user will forget to repin the section, and thus it gets moved, which may destroy all the 2D annotation. Worse still it gets deleted, particularly as it is possible to select an invisible section marker where the central part has been broken in 2D.
