What are Sub Navigation blocks?
Sub Navigation blocks automatically display the current page's location in the hierarchy of the site's navigation bar. This block's content is automatically generated based on the menu setup for your website.
Notes on Sub Navigation Blocks
Sub Navigation formats very differently between desktop and mobile layouts. On desktop, the entire sub navigation is visible. However, on mobile the section collapses into an open-able menu to conserve space.
When you are on a page within a sub navigation menu, the link is displayed in dark green with white text. Pages under your current page will display as indented when you are on the page.
If your page is not yet live, the Sub Navigation block will not display properly. This means the block may get longer or shorter once the page becomes published. Take this into account in your page planning to avoid sudden white space!