[otrs] merge?

Hi, I know there is a function to split tickets, but is there also a way to "merge" tickets? The function "link" is not very helpful, I think. It does NOT actually link (in the meaning of merge), but only indicate the other ticket numbers. It would be nice if there would be a function to merge tickets so that I can see all messages from one customer (with different ticket numbers) in one ticket together! Thanks, Marc