You can find theme option below (1,2) and right (3) to the main content area when you edit page/post.
You can make following changes for each page/post type:
- Change post layout
- Customize Title area
- Add additional content between footer and main content area.
Products, portfolio and testimonials posts also have their own settings.
All of the changes will be applied to the current page/post only. If you want to make the same changes to all posts/pages then you can do this in approriate sections of theme settings: Retro / Pages, Retro/ Blog, etc.
Metaboxes in WPBakery Page Builder admin mode:
Metaboxes in WordPress Gutenberg editor: