You can now select which category to display in a blog content block. This allows you for example to have an instance of your blog in a section of your website containing only posts that relate to it, without having to create separate blogs altogether.
When adding or editing a blog content block, you now have three selection mode options at your disposal:
Automatic: all posts are displayed.
Manual (individual posts): allows you to pick specific posts by their titles.
Manual (individual categories): allows you to select
You can select multiple categories using Cmnd-click (Mac) or Ctrl-click (Windows)