If you can't collapse a heading, it's either because you are using an earlier version of Word – it only works in Word 2013 – or the headings aren't formatted using one of the built-in heading styles. If you want to see all the text, click Expand All Headings. And click it again to collapse the section. To expand a section, click this triangle. The collapsed headings become something like a table of contents. Now with all the body text out of the way, it's easier to browse through the document. Right-click a heading, click Expand/Collapse, and click Collapse All Headings. Here's a handy trick you can use when you're having trouble navigating a large document.
