What problem is this feature trying to solve?
Responses have jobid_target, requests have jobid_source which can be found by looking up in the message list.
How would you like it to be solved?
A very fancy solution would be showing lines between messages similar to git clients, but that's probably too hard to achieve in winforms.
Perhaps a button can be added to jump to the request when viewing a response, and jump to the response when viewing request message.
Have you considered any alternative solutions
Alternatively, the right side could be split into two windows where it shows both request and response at once.
Additional Information
No response