Blank pages can be inserted before or after any page in the document. Right-click on a page in the preview, select "Insert blank page", then select either "before this page" or "after this page".

Note: It is possible to change the appearance of the blank pages you insert. For example, you may want a blank page that says, "This page intentionally left blank". In order to change the appearance of blank pages, create a form and name it "blank.fp". The contents of the "blank" form will be used for inserted blank pages.