Before you perform a preflight check in your PDF document, you may want to edit your PDF document first. And you may want to use Action Lists to perform a number of Global Changes. For example, you may have a number of Action Lists to correct or change colors in your PDF document. Instead of running these Action Lists separately and then performing the preflight check, it may be a better idea to include these Action Lists to your Preflight Profile. You will then kill two birds with one stone: