This members-only tutorial provides the steps to add a section on single posts to display 4 random posts (excluding the current one) in the same category/categories as the current post for a custom "related posts" functionality in Oxygen.
We shall add the PHP code for this in a Code Block to
retrieve the current post's categories
store the array of category IDs in a variable
get comma-separated category IDs in a variable
write a WP_Query arguments array
write a basic loop to show post titles
and finally replace the above loop with PHP and CSS from the default Easy Posts component's preset.
Step 1
Edit the Template that applies to single blog posts with Oxygen.