what happens if you right-click on the container?
I get a pop-up with different choices, like rotate, zoom, print, search, document properties, show navigation buttons, mark and hand tool.
You need to first export the file from the container field and then use the 'Open URL' step.
Make the field a button and attach this script to it.
You will have to amend to suit your field names of course.
PS Ignore the Go To Layout step in my example.
PPS This is for PC. I believe it will work for Mac too but not sure. You may have to put 'Filewin' rather than 'File' in the Open URL bit.