My field group needs a custom option (for the whole group, not for its fields), like this:
So I played around the code and found I only had to had a new group to wp-content/plugins/advanced-custom-fields-pro/admin/views/field-group-options.php and add the default value into wp-content/plugins/advanced-custom-fields-pro/api/api-field-group.php:
// grid width
'label' => __('Largeur du groupe','acf'),
'instructions' => __('Largeur du template comportant cette grille de contenus','acf'),
'type' => 'number',
'name' => 'grid_width',
'prefix' => 'acf_field_group',
'append' => 'px',
'value' => $field_group['grid_width'],
Hi @endcore, unfortunately I got no reply from the Support so I ended up with disabling auto-update of the plugin (by removing the key used for the pro version) and copy/pasting my custom edits each time a new version is out.
Obviously this is not a professional way to maintain a site, so I hope this featured will be official soon.
Don’t forget to reply to this topic if you find a way!