Edit PDF in OO-Draw

[Patton Echols]

I have a PDF that is intended to be printed out, blanks filled in and 
mailed in.  I would like to modify the document to add fillable fields.  
With a new odf document in Writer, I am able to do this.  But the PDF 
will not open in Writer and can only be opened in Draw.  I do not see a 
way of inserting fillable fields in Draw.  Google gives me lots of pages 
that tell about inserting text boxes, text over graphics, text frames, 
etc.  Not fillable fields.  Does that facility exist in draw?  If so, 
can anyone tell me how to access it?

Thanks
--PE