A report starts with two carefully formatted headings. Several revisions later, it contains five font sizes, inconsistent spacing, and bold lines whose purpose is unclear. Styles address this by giving a paragraph a reusable role. A heading belongs to a defined level, and its appearance is controlled centrally. This makes later changes easier and gives the document a structure that is more meaningful than a collection of visual adjustments.
Start with a small set of roles
For an ordinary report, begin with body text, a first-level heading, a second-level heading, and perhaps a caption style. Assign those roles to existing paragraphs before adjusting colors or fonts. A line is a major heading because it introduces a major section, not because you happen to want it to look large.
Review the outline as a whole. Under “Getting there,” you might place “By train” and “By car,” both at the same subordinate level. A brief aside within a paragraph does not require a new heading. Let the content determine how many levels you need instead of introducing levels for visual variety.
Use the application's list feature for lists instead of typing hyphens and spaces. Here too, the application should be able to identify which paragraphs belong together. A visual imitation can fall apart when lines wrap or the text is revised.
Change the style rather than every paragraph
If every subheading needs more space, modify its style. Word allows you to adjust an existing style or update it from a suitably formatted selection. Check which style is active so that you do not accidentally change all the body text.
Direct formatting remains useful for individual emphasis, but it should not create a second hidden system. If every third heading has been manually repaired, a later central change will produce inconsistent results. Remove those exceptions carefully and check that intentional emphasis survives.
Space before and after paragraphs belongs in paragraph settings. Pressing Enter several times creates empty paragraphs that can appear unexpectedly around page breaks. Use an actual page break when a section must begin on a new page, rather than pushing it downward with blank lines.
Test consistency with one change
Temporarily change an obvious property of one heading style and inspect the document. Do all the appropriate headings respond? Does ordinary text remain unchanged? Undo the experiment or keep the intended design. This is a useful way to find paragraphs that only look like headings.
When pasting material from another document, check its roles as well as its appearance. Finally, use the navigation view to review the hierarchy. It cannot replace an editorial review, but it can reveal a missing section or a minor point placed at the wrong level.