Today, it's not possible to filter tables to only show records that do or do not have files attached.
A possible advanced filter for this would be to only show records with files attached that exceed (or are smaller than) a certain size (1 MB for example).
Not having this filter makes it very hard to make sure all files that are attached have been printed. Also there is no real step in the app to confirm that it has been printed, so if a special packing slip is required there is no check point or stop point to make sure it is printed.
I agree with Seth and think this feature would help tremendously