Elements controlling the way a database is displayed:
The 
symbol, as long as it available, makes it possible for the content of the currently selected nodes to be exported into a PDF. The PDF module provides comprehensive options: Paper formatting, document formatting, and the possibility to define the way the header and footer will be displayed.
- The paper format options list accomodates different paper sizes.
- The layout options list sets the page layout parameters: vertical or horizontal.
- The colour options list defines, whether the PDF will be created in colour or black and white.
- The design menu defines the way an optional header or foot would look.
Options for headers and footers are taken from http://wkhtmltopdf.org/:
[page] Replaced by the number of the pages currently being printed
[frompage] Replaced by the number of the first page to be printed
[topage] Replaced by the number of the last page to be printed
[webpage] Replaced by the URL of the page being printed
[section] Replaced by the name of the current section
[subsection] Replaced by the name of the current subsection
[date] Replaced by the current date in system local format
[isodate] Replaced by the current date in ISO 8601 extended format
[time] Replaced by the current time in system local format
[title] Replaced by the title of the of the current page object
[doctitle] Replaced by the title of the output document
[sitepage] Replaced by the number of the page in the current site being converted
[sitepages] Replaced by the number of pages in the current site being converted