In DT3 I can set a default markdown stylesheet using Preferences > Files > Markdown > Style Sheet.
However, that chooses a default file stored outside of any DT database, which of course is great when you want to share the file across databases, but not so good when the database “travels” (e.g. via sync). It would be really nice if I could set a per-database default style sheet that was contained within the database (then it would not get “detached” from the database over time or as a result of moving stuff around in the file system). Of course, this would be per-database rather than global for all databases, but it would certainly help my workflow (since I use one style sheet per database anyway).