Change Drupal 8 'Powered By' block By editor, 31 May, 2016 Question How to edit the Drupal 8 system's "Powered By" block ? You can't change the body of this block fron the user interface. But you can do that using a small custom module using hook_block_view_alter(). Example: in the yourmodule.module function yourmodule_block_view_alter(array &$build, \Drupal\Core\Block\BlockPluginInterface $block) { if ($block->getBaseId() === 'system_powered_by_block') { $build['#pre_render'][] = '_yourmodule_block_poweredby_prerender'; } } function _yourmodule_block_poweredby_prerender(array $build) { $build['content']['#markup'] = 'Your text'; return $build; } Then clear the cache NOTE: You can also remove the system 'Powered by Drupal' block and replace by a custom block. Tags Drupal 8 Code Module