The rpress_special_instructions filter is applied to get special instructions. It receives one parameter. The text field can be modifird by using this filter.
apply_filters( ‘rpress_special_instructions’, true );
Example:
function rpress_special_instructions_callback( $instructions ) {
$instructions = __( 'Additional Information', 'restropress' );
return $instructions;
}
add_filter( 'rpress_special_instructions', 'rpress_special_instructions_callback', 10, 1 );