Welcome @addee 
We probably have different preconceptionsâespecially when new to DEVONthinkâso itâs good to be specific.
I too was not really sure what you meant with
since thatâs a bit vague and could refer to different things. I donât journal in DT myself. But I know many do, and I have been wondering if I should start doing that as well.
To me it seems straightforward enough: Create a file, start writing! You can use placeholders and templates (even smart templates) to automatically fill out metadata like date and time before you start writing. Many things are possible and smart templates can get pretty elaborate, but thatâs not necessary at all.
Whether you enjoy the built in text editor is, in my mind, distinct from how straightforward it is
I personally really dislike âto render MD preview in real timeâ. Still, I prefer a different editor a lot of the time for some of the same reasons as meowky; most importantly a maximum line width. (Planned for a future release according to the developers.) I also enjoy the typewriter scrolling and focus mode of iA Writer, which is my favorite digital writing environment.
Iâm curious why having DEVONthink watch an external folder is your preferred solution? Importing files is the default for a reason, but indexing makes sense in some cases. This might be one. Like @saltlane, I keep my iA Writer folder in iCloud indexed.
Or⌠you could just create the file in DEVONthink, but still use an external editor? That skips the whole import process. In the preferences, under General > Interface, you can enable the option âDouble-click opens documents externallyâ. I just use the default keyboard shortcut â§âO (Command-Shift-O) to open files externally. Just make sure the editor you want is set as the default application for markdown files.
If you create the files in DEVONthink, you get the benefits of placeholders and templates, but you can still easily use your preferred editor.
On Smart Rules and such
DEVONthink really has a terrific manual
If you are in doubt about some detail, like the Smart Rule action @chrillek mentions, you will generally find a clear explanation in the Appendix. If you look under Appendix > Smart Rule Events and Actions > Actions, you will find this description:
Move Into Database: Moves indexed items into the database, essentially importing them. Note this removes the file from the original location in the filesystem.
Pro Tip: download the manual in PDF form here and put it in you main database or Global Inbox. Add it to the favorites section of the sidebar. You donât need to read all of it in one go (or ever), but now you can quickly open and search it with DEVONthinkâs search inspector. And since itâs PDF, itâs easy to highlight, annotate and refer to in notes. With item links you can even link to specific locations in a PDF (a page or a precise string of text).