For each page you can set these variables in the frontmatter:
title - The main heading of the page.
This text will be rendered as the <h1> tageleventyNavigation - allows to add the page
to the navigation menu. There is a separate page
for it.showSiteTitle - if true, hides the site title. This option
is useful if you want to minimize distraction of a visitor
from the contentdate - the publication date. This date is shown after the post's title
in a blog posts list (/blog and /blog/all routes).
Note that you can disable publication date
displaying with showPostDate variable in the _meta.js file.toc - if true, shows a table of content at the beginning of a pagedescription - short description of a page. Used for open graph's description
tag.image - open graph's thumbnail image