Ever wanted to have numbered headings in Confluence? Either on the wiki page or in PDF exports?
The Numbered Headings plugin can do this.
In its simplest form you just go with the default values and get decimal numbers prefixing the headings.
The plugin offers a variety of options and I highly recommend to read the documentation.
Really awesome is that you now have numbered headings in PDF exports, so readers or reviewers of the PDF version can refer to the numbers instead of citing the whole heading.