18. Headers are always on top of every page of a document while Footers are always at the bottom of every page of a document. Headers and Footers
19. Autocorrect is to correct entries typed wrongly by the user while in autoformat your lists on your paragraph is formatted as you typed. Automating Templates: Autocorrect and Autoformat
20. Allow us to share information with others who may use our documents through comments and tracking changes. Tracking Changes