Hi, Encountered a difference on export of normalised data. Flattening does not seem to be preserved when saving current group as norm(E) but is when saving marked group. Example in norm.prj attached. original data set normalised and flattened...displaying "Normalized" as current group or as marked group looks the same: current: marked: On saving current or marked group as norm(E), re-importing and plotting as mu(E) marked is still flattened, but the set exported using "save current group as" is not flattened. Similar difference saving "marked" versus saving "each marked" So it seems only "Save marked group as..." preserves flattening for norm(E). -R.