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Modify PDF files with Quartz filters in ColorSync Utility on Mac
You can use Quartz filters to modify a PDF document by adding effects, changing the color space, or reducing the size of the file.
- Go to the ColorSync Utility app  on your Mac. on your Mac.
- Choose File > Open, then select a PDF document. 
- When the file opens, click the Filter pop-up menu at the bottom of the window, then choose a filter. - The effects of that filter are reflected in the window, but the file isn’t modified. - To step through the pages of the PDF document and see the filter effects on each page, use the navigation arrows in the toolbar. - To view available filters, click  in the toolbar. in the toolbar.
- Click Apply when you want to save the changes.