TIP: SysMLv1: Cameo: Can't see the Item Flow Manager icons in the smart manipulators for an ObjectFlow in an Activity Diagram with swimlanes? Try setting Item Flow Creation Mode to 'Between Part Types' instead of 'Direct' under your Project settings!
SysMLv1: MagicDraw/Cameo: HOWTO show "missing" ItemFlows after using Display Related Elements to re-draw Associations and Connectors. Use the 'Show Realised Item Flows' and 'Realize All Item Flows' smart manipulators.
SysMLv1: MagicDraw/Cameo: If redisplay of an Association with an InformationFlow or ItemFlow creates a strange extra dashed line with «ItemFlow» keywords (separate from the Association) just remove (only) that extra dashed line from the diagram.