I make extensive use of the built-in Annotations feature when reading and reviewing PDFs and other documents. In markdown, the pane is a mini DT markdown editor that does the same WYSIWYG-ish formatting.
There is a great feature that allows me to highlight a block of text, and Insert Quote, which not only pulls the text into the Annotations document but also appends the location (page number and back-link) of the source text.
To differentiate between my thoughts and the text that were copied verbatim I add a “greater than” (>) markdown element as the first character of the pulled quote manually (see image).
To reduce more friction it’d be great if DT3 has the option of pre-pending that > (plus one space character) automatically for quote insertion for markdown annotations.