This post is a test of functionality for creating an Image gallery in Drupal 9 using the core Image module and the Colorbox module for overlay display.
This post is actually about my yet another attempt to create an image gallery in Drupal, but now I am using Drupal 9. I have a premium account in Juicebox, unfortunately, it is not yet available to Drupal 9, so I use Colorbox instead for overlay.