How can I attach intermediate events in Signavio?
Please add a task to your diagram and select the subset "Complete" of elements. You find throwing and catching intermediate events in the menu. Then, please drag the Catching Intermediate Event you like to add and drag it on the task till the task is highlighted green. Please find further information on this topic as well under: BPMN modeling
KBA , BPI-SIG-PM-MOD-EDT , Graphical Editor for SAP Signavio Process Manager , How To