For me, notebooks and tags are a good way to organize, find and work with my notes. Sometimes I just create a note and after a while I associate it with a specific notebook or tag. Is it possible to find notes that has no tag or that is not associate do any notebook?
I am using v1.2.6 on Ubuntu 20.04 and installed Joplin from Snaps.
It is worthwhile to spend some time (perhaps two or three times), on the home page manual with the section on search. I actually copied that section and made a note (tag: Joplin). The search is really quite flexible. https://joplinapp.org
Thanks. I found notes created on my iPhone always fall into outside of existing notebooks, making it really hard to find those notes later on other device. Your search string works.