If you move a seam and the existing systems and parts are modified instead of replaced, then the software does not use split notification. Structural Detailing features are not transferred from one part to another, and are placed on the To Do List. If a feature is on one part and a seam is later modified so that it crosses the feature, the feature is still on one part. Split notification is not used when a seam is modified.
Split notification works with design seams from Molded Forms as well as with planning seams.
If there are multiple features on one sketch, the software creates two sketches after the split; one for each part. Constraints associated with a sketched feature only go with one sketch after the split. You must manually add the constraints to the other sketch.