Is there documentation somewhere that I have missed? Not usage examples, but documentation on each module, or at least the export module? What is the underlying library used for this? fpdf? tcpdf? wkhtmltopdf?

i.e. for the export module, is there a list of all values that can be passed to 'pdf' somewhere?

like so far, ____from examples.... I know I can pass these 2

->pdf(array(
    "format"=>"A4",
    "orientation"=>"portrait"
))

and I can also set

 {pageNum}

which is the current pagenum.... but what about total pages in the document? so I can write {pageNum} of {pageNumTotal} (or whatever it is)