Configuration
Define your own theme helper tags
You can add your own theme helper tags in localconfig.php in system/config. Afterwards clear the cache in the Contao Manager.
$GLOBALS['tl_config']['theme_tags'][] = 'THEME_HELPER_01';In the article settings, select the theme helper tag you created under Template settings.
You can then use the content of the article anywhere with the following insert tag.
{{theme::content::THEME_HELPER_01}}