Hook for adding values to add node page I'm searching for a hook in Drupal 8 API for adding values to a add content form.
What hook can I use to alter values from /node/add/movies_movie page?
Think you are looking for the form alter hook here: https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Form%21form.api.php/function/hook_form_alter/8.2.x