Apple OSX reducing PDF file size

Everyone knows that OSX can print to PDF, and you can do this 2 ways: in the print dialog box you can select "save as PDF" which does exactly that, or, you can "open PDF in preview".


An advantage of opening the PDF in preview is that when you can save you can apply some filters, courtesy of the Quartz engine.


You can also save in a different file format, which is cool.



But what about a PDF thats been sent to you? Well you can load it into the ColorSync Utility


and you can then select 'export'


since the underlying engine is the Quartz engine you get the same options. Cool!