With the Community Builder Theme, You have plenty of options to customize the layout and presentation of the single post, page, or any post type.

Layout Options:-

On the New/Edit post/page/post type screen, There is a Layout metabox present that controls the page layout.  It looks like the below image and appears in the right sidebar (You can drag it anywhere).

Layout:-

In the layout block, you can override the default global site layout. You can use any of the three available layouts.

Templates:-

Templates are only available for non-hierarchical post types. WordPress supports templates for the hierarchical post type out of the box. It is useful when you want to work with a page builder etc. There is a Page Builder Blank Page Layout available to specially work with any of the page builders.

Layout Blocks:-

Layout blocks allow you to hide the Site header, footer, and the footer copyright per page basis.

Panel Left:-

You can control the appearance of the left panel with these options. It allows you to override the default site visibility of the panel for the current page. You can select the user scope and the visibility.

Panel Right:-

You can control the appearance of the right panel with these options. It allows you to override the default site visibility of the panel for the current page. You can select the user scope and the visibility.

Page Header Metabox:-

Page header meta box allows you to control the visibility and appearance of the page header block. You can turn off the visibility of the page header and upload a new background image for the header for individual pages. It appears below the post box.