Thanks for your detailed answers.
I had assumed that for import and export the mmP files were most suitable, but actually the mmT files are more suitable.
I hadn't set my MMT folder initially (a bit confusing with all the different RunParams.txt files, and the many options which can be set.).
The menu TL-> Unify + Store in MMT Folder does what I need. But didn't pop up any folder selection menu when tried it... which is handy once you know what it does, but at first one doesn't and its a bit of a mystery of where this MMT folder would be, so a beginner naturally gravitates effort towards the File menu (where opening and saving proofs in mmP format occurs), theres also the luring "Export via GMMF" in the File menu.
I was hoping for directly
set.mm compatible snippets, in separate files, so I can append it to my
sandbox.mm (which includes
set.mm).
Luckily this exactly what the MMT format Theorem Loader menu does!
So my workflow is that I have a script and modified RunParams (to set the MMT directory). The tell mmj2 to load my
sandbox.mm ( which implicitly loads
set.mm).
I can thus CTRL-G(et) any proof for inspection / inspiration, or make a new proof, when finished I renumber and TL->Unify+StoreMMT.
Then I can do some cosmetic commenting etc either on the .mmt file before concatenating to
sandbox.mm or else if after appending to
sandbox.mm, I can still edit it in
sandbox.mm using in my case nano.
So I never need to use a pointer device (mouse) to select and copy/paste fragments.
Again, thanks for your patience in guiding me around.
I had some email conversation in the past with Norm, back when I implemented a non-publish worthy verifier (as an exercise or check that I understood the verifier itself, as its too easy to nod in agreement while reading the book)
Is there a way to download all of the Metamath google groups discussions without scraping? I'm sure theres many interesting observations, and having a physical backup would be nice.
For fun I went all the way back to the earliest messages, and noticed some bit rot already: a stale URL to an introductory pdf on formal verification, without title in the message. Luckily I was able to find that file by filename on the web.
I don't know how long that would be possible with more and more transitioning to ML search engines.
There is a search bar in Google Groups, but I'm not sure how to make it for example emit all URL's in the emails, in the hopes of recovering as many references to convserve the history of metamath.
If we could have a bulk dump of the Metamath group conversations (names or emails obscured would be fine), it would be easy to grep for URL's, sort them by domain, etc... in order to efficiently locate broken links.
Also Norm was always exceptionally kind in his communications.
I feel like I lack some kind of biography of Norm, apart from a single youtube video in which he appears (the discussion with Stephen Wolfram, Norm and You) and apart from the academic articles I can find via semantic scholar,
Possibly thats why I feel hoarding these google groups messages ..