Atlantis has 2 modes of AutoCorrect:
A. AutoCorrect AS-YOU-TYPE
B. AutoCorrect AFTER-YOU-TYPE
AutoCorrect AS-YOU-TYPE works automatically when the “Autocorrect as you type” box is checked in the “Tools | AutoCorrect Options…” dialog.
AutoCorrect AFTER-YOU-TYPE applies only if you run the “Tools | Autocorrect” command.
As the names indicate, AutoCorrect AS-YOU-TYPE works as you edit documents, old or new; AutoCorrect AFTER-YOU-TYPE works only on already created documents.