PDF Export improvement - partial export

Sometimes when I'm doing a PDF export of an unstructured page or of a structured page, I would like to be able to select only the sections that are relevant to me in the pdf export.
ie: Book reference, Document ID, Description.
If I'm only interested in the Description section, I should be able to export only this.

The idea is that it could be great to list all the sections contained in the page (like what the table of content macro is doing). When exporting in PDF, it lists all the sections that will be exported. You can check or uncheck the section you want / or don't want in your pdf export.