change default caption from h2 to h1 on Easy Slider

But you know that you can switch to h1 on the advanced tab of the slide itself – where you input the caption? :

you can change the default heading to h1 on all sliders – because the filter is only in the av-helper-slideshow.php.
So influence of that is for easy slider , full-width slider and full-screen slider aswell.

this to child-theme functions.php:

function my_avf_customize_heading_settings( array $args, $context, array $extra_args = array() ){
  if( $context == 'avia_slideshow' ){
    $args['heading'] = 'h1';
  }
  return $args;
}
add_filter( 'avf_customize_heading_settings', 'my_avf_customize_heading_settings', 10, 3 );