Add Save As Draft button on edit/create page

I would like a "save as draft" option when creating/editing a page on the wiki. You should be able to at any time save a draft of a post/page that you can edit later. You can have any number of drafts and you can save the draft on demand for a new page or an existing page (not sure how this would work if I edit a page and save as a draft and someone else edits that same page if I would have to merge or just overwrite their change). I realize that Confluence automatically saves drafts under the Preferences -> Drafts space but its based on some timer value that individual users cannot configure (at least I haven't found out how to). I would like to know my draft has been saved, instead of leaving my browser page open "long enough" for the auto-save to kick in.