Adobe Acrobat 7 Professional - Manual (Page 387)

Creating headings
To help readers navigate through the document and find the information they need, make
sure that headings are tagged with the appropriate level to indicate their hierarchy in the
content. Then, convert heading tags to bookmarks. (See
Creating bookmarks .)
To create a heading tag:
1. Select the TouchUp Reading Order tool, and then select the heading text in the PDF
document.
2. In the TouchUp Reading Order dialog box, select the appropriate heading tag (for
example, Heading 1, Heading 2).