Infix Pro PDF Editor can create:

To create a new, blank PDF document:

  1. Choose File->New... then choose Blank
    Create New Document options
  2. Choose the Number of pages: in the new document.
  3. Choose the Page Size to be used throughout the new document. 
    Use the list of Built-In: sizes or define a Custom: size.
  4. If you want to keep the current document open, tick Open in new window. 
    This is handy if you want to copy objects from the current document to the new one.