Use the file manager to expand the Shared folder and open _Layout.cshtml. This hidden page defines the HTML for the header, left navigation, and footer. There are two special directives used in this page.
@RenderBody() is replaced with the markup from each page that uses _Layout. In this case it lives inside a
<div class="container">. This is a bootstrap CSS convention that provides correct spacing and padding. The second directive is
@RenderSection. This will be replaced by
<script> blocks as needed for things like input validation.
The file manager _Layout.cshtml is open in the Pages/Shared folder. This hidden page defines the HTML for the header, left navigation, and footer.