Alter the view modes for entity types.
array $view_modes: An array of view modes, keyed first by entity type, then by view mode name.
hook_entity_view_mode_info()
Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.
function hook_entity_view_mode_info_alter(&$view_modes) {
$view_modes['user']['full']['status'] = TRUE;
}