Opened by hitting alt-f3 or f11 (if your keyboard is state-of-the-art enough) in WordPerfect. This window pane should always be open, since it actually lets you see the document content. Though popularized in the 5.1 days, those shortcuts work in the newer versions.

Microsoft claims to have no such codes, however. This is crippling not only in that you have poor control over your document, but also in that performing a find and replace with codes, like ENTER, is impossible.