Hello David,
Thank you for posting to our forums with your feedback. I've gone ahead and logged your request for the add/edit tags option from the Action menu, and it will be under consideration for prioritization. If there are any updates, we will be sure to update this post.
Currently we provide the ability to select each of your orders and then choose to Print Packing Slips or Pick Lists in bulk, from the Pick and Pack menu at the top of the Orders page.
However, if that does not work for your order processing, could you provide some additional details about your order processing steps so we can understand your needs better.
Thank you.