When you edit a page, DokuWiki automatically creates a draft file of the currently edited page every 30 seconds. This is done through AJAX in the background without interrupting the editing process. In case of an editing interruption (eg. Browser crash) the draftfile can be reloaded later and editing continued. Saving a draftfile can be forced by pressing the preview button.
Drafts are recalled when you try to edit again a page you tried to edit previously. The draft is then shown instead of the edit window. Two buttons enables you to
Recover the saved draft.
Draftfiles are user dependent. A draftfile expires when a new revision of the page is saved by another user.
The feature can be disabled using the usedraft option.