Default output of tshark has an arrow icon between _ws.col.Source and _ws.col.Destination like this:
13   1.001761 192.168.1.246 → dns.google   ICMP 98 Echo (ping) request  id=0x1d5b, seq=48154/6844, ttl=63
When I apply my own specified output, referring to this answer, the → icon disappears.
13   1.001761 192.168.1.246  dns.google   ICMP 98 Echo (ping) request  id=0x1d5b, seq=48154/6844, ttl=63
What should I do to show the the → icon to the output when I need to use my own filter?