I apologize if I’ve missed this somewhere else, but I was wondering whether it was possible to “fold text” natively in DEVONthink. Several other apps, such as Apple Notes and Bear have added this ability, and I find very helpful in dealing with longer notes. If not possible, I would suggest as a possible feature in the future.
Thank you.
No worries but no, this is not a feature in DEVONthink.
It’s possible to insert a details element in Markdown, if you aren’t a Markdown purist, but there is no native text folding support in Markdown. That’s something those apps have implemented on their own.
Understood. Thank you for the quick response. One of my favorite features of DEVONthink is the customer support and active community. Thank you again.
I’ve never thought of it as a feature, but I’m glad it’s working well! 
I use this html code
Works in markdown, formatted note, and this forum
<details>
<summary>text</summary>
This text will be hidden
</details>
edited; corrected html code
could you explain how to use your code?
In a plain dummy way 
See e.g. this explainer on how to include a <details> element in markdown.
Also checkout the Discourse syntax. Discourse supports certain BBCode tags, including the one posted by @DTLow . It is not part of the markdown syntax.
Sorry, my original post got scrambled so I edited with the correct html code
I just insert the code into a Devonthink markdown note
For posts in this forum, the code is inserted using the
icon