Genesis Sample functions.php per WPCS. https://sridharkatakam.com/genesis-samples-functions-per-wordpress-php-documentation-standards/

functions.php

<?php
/**
 * Genesis Sample.
 *
 * This file adds functions to the Genesis Sample Theme.
 *
 * @package Genesis Sample
 * @author  StudioPress
 * @license GPL-2.0+
 * @link    http://www.studiopress.com/
 */

// Start the engine.
include_once( get_template_directory() . '/lib/init.php' );

// Setup Theme.
include_once( get_stylesheet_directory() . '/lib/theme-defaults.php' );

// Set Localization (do not remove).
load_child_theme_textdomain( 'genesis-sample', apply_filters( 'child_theme_textdomain', get_stylesheet_directory() . '/languages', 'genesis-sample' ) );

// Add Image upload and Color select to WordPress Theme Customizer.
require_once( get_stylesheet_directory() . '/lib/customize.php' );

// Include Customizer CSS.
include_once( get_stylesheet_directory() . '/lib/output.php' );

// Child theme (do not remove).
define( 'CHILD_THEME_NAME', 'Genesis Sample' );
define( 'CHILD_THEME_URL', 'http://www.studiopress.com/' );
define( 'CHILD_THEME_VERSION', '2.2.4' );

add_action( 'wp_enqueue_scripts', 'genesis_sample_enqueue_scripts_styles' );
/**
 * Enqueue Scripts and Styles.
 */
function genesis_sample_enqueue_scripts_styles() {

	wp_enqueue_style( 'genesis-sample-fonts', '//fonts.googleapis.com/css?family=Source+Sans+Pro:400,600,700', array(), CHILD_THEME_VERSION );
	wp_enqueue_style( 'dashicons' );

	wp_enqueue_script( 'genesis-sample-responsive-menu', get_stylesheet_directory_uri() . '/js/responsive-menu.js', array( 'jquery' ), '1.0.0', true );
	$output = array(
		'mainMenu' => __( 'Menu', 'genesis-sample' ),
		'subMenu'  => __( 'Menu', 'genesis-sample' ),
	);
	wp_localize_script( 'genesis-sample-responsive-menu', 'genesisSampleL10n', $output );

}

// Add HTML5 markup structure.
add_theme_support( 'html5', array( 'caption', 'comment-form', 'comment-list', 'gallery', 'search-form' ) );

// Add Accessibility support.
add_theme_support( 'genesis-accessibility', array( '404-page', 'drop-down-menu', 'headings', 'rems', 'search-form', 'skip-links' ) );

// Add viewport meta tag for mobile browsers.
add_theme_support( 'genesis-responsive-viewport' );

// Add support for custom header.
add_theme_support( 'custom-header', array(
	'width'           => 600,
	'height'          => 160,
	'header-selector' => '.site-title a',
	'header-text'     => false,
	'flex-height'     => true,
) );

// Add support for custom background.
add_theme_support( 'custom-background' );

// Add support for after entry widget.
add_theme_support( 'genesis-after-entry-widget-area' );

// Add support for 3-column footer widgets.
add_theme_support( 'genesis-footer-widgets', 3 );

// Add Image Sizes.
add_image_size( 'featured-image', 720, 400, true );

// Rename primary and secondary navigation menus.
add_theme_support( 'genesis-menus' , array(
	'primary' => __( 'After Header Menu', 'genesis-sample' ),
	'secondary' => __( 'Footer Menu', 'genesis-sample' ),
) );

// Reposition the secondary navigation menu.
remove_action( 'genesis_after_header', 'genesis_do_subnav' );
add_action( 'genesis_footer', 'genesis_do_subnav', 5 );

add_filter( 'wp_nav_menu_args', 'genesis_sample_secondary_menu_args' );
/**
 * Reduce the secondary navigation menu to one level depth.
 *
 * @param array $args An array containing wp_nav_menu() arguments.
 * @return array $args Modified array containing wp_nav_menu() arguments.
 */
function genesis_sample_secondary_menu_args( $args ) {

	if ( 'secondary' !== $args['theme_location'] ) {
		return $args;
	}

	$args['depth'] = 1;

	return $args;

}

add_filter( 'genesis_author_box_gravatar_size', 'genesis_sample_author_box_gravatar' );
/**
 * Modify size of the Gravatar in the author box.
 *
 * @param int $size Current size of gravatar. Default is 70.
 * @return int Modified size of gravatar.
 */
function genesis_sample_author_box_gravatar( $size ) {

	return 90;

}

add_filter( 'genesis_comment_list_args', 'genesis_sample_comments_gravatar' );
/**
 * Modify size of the Gravatar in the entry comments.
 *
 * @param array $args Current arguments for the list of comments.
 * @return array Modified arguments with size of gravatar changed from the default of 48.
 */
function genesis_sample_comments_gravatar( $args ) {

	$args['avatar_size'] = 60;

	return $args;

}