thanks for the fast reply! I recently stumbled upen the "DynamicLegend" option myself and first thought, this was the same as the context-menu's "refresh". However, ‘DynamicLegend’ only seems to react to additions or deletions to the axes: switching the ‘Visibility’ of a line to ‘off’ or switching the legend entry off by
is ignored by the ‘DynamicLegend’ feature. :( The “refresh” function correctly removes the corresponding legend entry in these cases.