Where does the code come from?

Question

Drupal

Editing the topic header.
In page.tpl, the next piece is where
<?php print render($page['header']); ?>
I can’t understand where it leads and where the code is taken from in this part.
From the admin panel or search among the theme files?

Answer 1

Hello, nevertheless it is specified in your line, subject, regions[header] = Header.