Tuesday, Andy Burnelli murmurred ...
I don't see a way to display headers. The "Show original message"
option is still in the per-message hamburger, but it's been grayed out.
ISTR a tick by the author's name would show some headers, but that's
all the way gone.
The search box doesn't find the message-id. For that matter, the
"Advanced search" dialog has lost several options from just a couple
years ago. "Does not have" is missing, for instance.
There may well be an operator to use in the searchbox that will find
the message-id, but finding that may be a herculean task .... I tried
a couple of guesses but was unsuccessful.
SWAG: since GG has all sorts of statistics, and probably doesn't have
the top code maintainers, they may have looked at what searches happen
in GG and dumped the ones that require more than new-hire skills to
implement.
[I'm pretty sure they have Message-ID field in their database, to use
for threading the messages.]
/dps
--
https://xkcd.com/2704