Hi,

is there a way to add an extra page to the pdf if the document has odd number of pages? Or show/hide the last page with css based on page count?

You can add this at the end of your document:

<div style="page-break-after: right">
</div>

Edit: or just apply this style to the body element? Might be simpler!

Edited 29 Nov 2013 by mikeday

What about if I want the page to have some content?

That gets tricky if you only want that content to be shown when the document would otherwise have an odd number of pages. You can use the @page:blank selector and put things in the margin boxes, that's about it.