Overall Editing Stage
In Setup 4.5 add a third item to “Select one”: ( ) A copyediting stage will not be employed in this journal.
Presumably also add the same as above, but for Layout Editing and Proofreading.
Some journals, incl. Coaction, don't use OJS for editing at all, and really just need to be able to work directly with an external typesetter after the review process is complete. So maybe add an option to "send to external typesetter" for copy/layout/proofing, at which point the Review process is marked complete, and the Editing process is triggered, but with only an option to upload final galleys and schedule for publication.