Final code for myCRED Tutorial - http://mycred.me/tutorial/customize-transfers-in-1-5/

customize-transfers-in-15

/**
 * Example 1: Transfer Messages
 * Step 1 : Insert Message Field
 * @version 1.0
 */
add_action( 'mycred_transfer_form_to', 'mycred_pro_transfer_message_field' );
function mycred_pro_transfer_message_field() {
	echo '<label>Message</label><input type="text" name="transfer-message" id="mycred-transfer-message" value="" placeholder="Optional message to recipient" />';
}

/**
 * Step 2 : Save Message
 * @version 1.0
 */
add_filter( 'mycred_transfer_data', 'mycred_pro_save_transfer_message', 10, 3 );
function mycred_pro_save_transfer_message( $data, $transaction_id, $post ) {

	// Default message.
	$message = 'No message';

	// If a message is set
	if ( $post['transfer-message'] != '' )
		$message = sanitize_text_field( $post['transfer-message'] );

	// Add to the data array
	$data['message'] = $message;

	// return the results
	return $data;

}

/**
 * Step 3 : Show the message
 * @version 1.0
 */
add_filter( 'mycred_parse_log_entry_transfer', 'mycred_pro_show_message_in_log', 10, 2 );
function mycred_pro_show_message_in_log( $content, $log_entry ) {

	// Unserialize data
	$data = maybe_unserialize( $log_entry->data );

	// Default message
	$message = 'No message';

	if ( isset( $data['message'] ) )
		$message = $data['message'];

	// Replace and return
	return str_replace( '%message%', $message, $content );

}

how to display look like can you please upload that image