I have a workflow which runs several process pathways in parallel. I’m wondering if there is a way to bring all those parallel nodes into one node at the end, which waits until all are finished, before then executing a send email node?
You should be able to connect the hidden flow variable port (at the top right corner) of your nodes to the input of Send Email (or the Merge Variables node if you have many of them).
(To display these ports, right-click the node and select “Show Flow Variable Ports”.)