vels used in the ToC. Values can go from 2 to 6.</td></tr><tr><td><code>remove_toc_prefix</code></td><td>Hugo removes this string from the beginning of every entry in the ToC</td></tr></tbody></table><p>Some front matter fields only apply to so-called <em>bundle pages</em>. You can
identify bundle pages because their file names begin with an underscore <code>_</code>, for
example <code>_index.md</code>. In Istio, we use bundle pages as our section landing pages.
The following table shows the front matter fi