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                                             PDF files work great for construction estimating documents. PDFs will soon be the architects document of choice for a number of advantages. 
  1. The source documents are 
                                                secure  2. They tranport well over the internet  3. Everyone has the free viewer  4. Changes still have to be made by the architect  5. They are immune to version changes in the source 
                                                software for example autocad coming out with a new file format in dwg and the client having to upgrade or have the architect save it in an older version. 
  Another reason PDFs will work well 
                                                with cadest is the fact  that the whole blueprint page can be imported. This means that  when changes are made and another PDF is sent, you can  switch to the new picture and keep your 
                                                graphics and assemblies  intact. 
                                              
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