Regions and blocks

We mentioned regions in the previous chapter, where we showed the block placement for the Olivero theme.

The regions that are available when a specific theme is enabled are defined by the .info.yml file of the theme itself. For example, for Olivero, that file is core/themes/olivero/olivero.info.yml and contains, among other things, these lines:

regions:
  header: Header
  primary_menu: 'Primary menu'
  secondary_menu: 'Secondary menu'
  hero: 'Hero (full width)'
  highlighted: Highlighted
  breadcrumb: Breadcrumb
  social: Social Bar
  content_above: Content Above
  content: Content
  sidebar: 'Sidebar'
  content_below: 'Content Below'
  footer_top: 'Footer Top'
  footer_bottom: 'Footer Bottom'

Now, check the same file for our custom theme (themes/alps_trips...