When you are editing a highly structured, long page, "Heading Editor" is useful to change the heading levels in the block.
1. Select "Tool"->"Heading Editor"
=>"Heading Editor" appears.
2. Click the heading whose level is to be changed. To increase the level, click the [<<] button. To reduce the level, click the [>>] button. Repeat this operation to adjust the levels of all the headings of the page.
Hint
You can select and modify more than one heading.
3. Click the [OK] button.