Dropdown Basics
A dropdown's argument is its title, and everything indented under it is the body. Both are ordinary reStructuredText.
A plain dropdown
The body is parsed as normal block content, so it can hold anything — lists, code blocks, even other directives.
a bullet
another one
The title is parsed as inline markup, which no other directive caption in this build does:
See rinx.toml for the full list
A literal and an emphasis, both inside the summary bar.
:open: starts the dropdown expanded rather than collapsed.
Open from the start
Visible without clicking anything.
Written with no argument at all, the summary shows a placeholder icon instead of an empty bar, so there is still something to click.
No title was written for this one.
A dropdown is a container, so a directive written inside it really is parsed — this is the whole reason the build supports it rather than treating it as an unknown name:
Containing another directive
Note
An admonition nested inside a dropdown.