This selection will take you to a screen full of options. Once it’s open, select ‘Workflow’ from the options available. You’ll need to open Automator, an application that rarely sees much use, but which is easy to find, in your Applications folder (or via Launchpad).
However, here’s one way to convert these documents for free, using software which comes pre-packaged with your Mac.
There are many programs which can take a PDF document and convert it to any format you wish, so you can make changes to it without having to start from scratch or scribble over the top of the original PDF.
