PrimoPDF - Print to PDF from Windows applications and optimize the PDF output.
PrimoPDF installs as a PDF printer. This means you can use PrimoPDF to print your documents to PDF from any program on your computer.
1. From the document-authoring program, choose File>Print.
2. Select the PrimoPDF printer from the list of available printers and click OK.
3. The PrimoPDF window appears. Enter a name and location for the PDF file. You can also set other PrimoPDF options at this time.

4. If the selected location already contains a PDF with the same name, the File Exists window appears. Choose from the available options.
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Append. Adds the pages from your new PDF to the existing PDF. Pages will be inserted after the last page of the existing PDF.
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Overwrite. Replaces the existing PDF with the new PDF.
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Remember my choice. PrimoPDF will continue to apply the same option when encountering existing files.
NOTE: You can change this setting in the PrimoPDF Program Options. See PrimoPDF Program Options for details.
5. Click Save.
NOTE: By default, the PDF will automatically be opened in your default PDF viewer. You can change this behavior in the PrimoPDF Program Options.