3 ms·

Apparently https://sequencediagram.org/ https://sequencediagram.org/ is what you want. It has "non-instantaneous message"

• keithnz 5y ago
  It doesn't quite do what was asked, while it handles angled lines, it doesn't seem to support overlapping angled lines, which in comms systems is common
  • michegor 5y ago
    Well, if you really want to, you can do it: Alice->(5)Bob:message1 space -6 Alice(4)<-Bob:the other\nmessage