When it comes time to add new pages to your WordPress navigation menu, all you need to do is log in to your WordPress dashboard and use the Menu page's graphical interface to add those pages.

It may prove difficult or impossible to navigate through your WordPress dashboard if the formatting somehow becomes removed. Links and other content won't appear where you expect it to. Similarly ...

In your WordPress dashboard, ... You should only have one H1 tag per page or post. For the main sub-headings of my posts, I typically use the H2 tag. For instance, in this post, ...