OptInt PmWiki . Pm Wiki / . Edit Page | ... MROI Delay Line Design Contract . ... MROI DL Design Contract Private Material . ... Group Headers . Wiki groups | ... Group headers allow authors to create groups with custom headers and footers without having to coordinate with a wiki administrator . ... You can also set the variable $GroupPrintHeaderFmt and $GroupPrintFooterFmt in the same way as $GroupHeaderFmt and GroupFooterFmt in order to change the header used when action=print . ...