The Page Layout tab in Word allows you to set page layout options like margins, orientation, size, columns, watermarks, page color, and borders. It also allows formatting paragraph indentation and line spacing. The References tab adds tables of contents, footnotes, citations, captions, indexes, and tables of authorities. The Mailings tab creates envelopes, labels, and mail merges using data sources. The Review tab proofs documents for spelling, grammar, and translation and allows adding and deleting comments and tracking changes between versions. The View tab sets the document view and zoom level and allows switching between multiple open documents.