Featured Image Background Parallax section on single Posts in Altitude Pro. https://sridharkatakam.com/featured-image-background-parallax-section-on-single-posts-in-altitude-pro/

functions.php

genesis_register_sidebar( array(
	'id'          => 'single-parallax-section',
	'name'        => __( 'Single Parallax Section', 'parallax' ),
	'description' => __( 'This is the parallax section below nav on single Posts.', 'parallax' ),
) );

gistfile1.css

.single-parallax-section {
	margin-top: 0;
}

single.php

<?php

// Output Single Parallax Section below header
add_action( 'genesis_after_header', 'sk_single_parallax_section' );
function sk_single_parallax_section() {
	echo '<div class="single-parallax-section widget-area"><div class="wrap"><header class="entry-header">';
			genesis_post_info();
			genesis_do_post_title();
	echo '</header></div></div>';
}

// Enqueue Parallax
add_action( 'wp_enqueue_scripts', 'sk_enqueue_single_scripts' );
function sk_enqueue_single_scripts() {
	wp_enqueue_script( 'single', get_stylesheet_directory_uri() . '/js/single.js', array( 'jquery' ), '', true );

	// If the current Post does not have a featured image, abort
	if ( ! has_post_thumbnail() ) {
		return;
	}

	// Pass the URL of Post's featured image as value of a "src" key of "SinglePlxBkgrdImg" array to single.js
	wp_localize_script( 'single', 'SinglePlxBkgrdImg', array( 'src' => str_replace( 'http:', '', genesis_get_image( array('format' => 'url') ) ) ) );
}

// Remove the entry title
remove_action( 'genesis_entry_header', 'genesis_do_post_title' );

// Remove post info
remove_action( 'genesis_entry_header', 'genesis_post_info', 5 );

// Remove entry header markup
remove_action( 'genesis_entry_header', 'genesis_entry_header_markup_open', 5 );
remove_action( 'genesis_entry_header', 'genesis_entry_header_markup_close', 15 );

genesis();

style.css

/* Featured Image Background Parallax section on single Posts
--------------------------------------------------------------- */

.single .site-inner {
	margin-top: 96px; /* 170 (default value) - 94 (height of fixed header) */
}

.single-parallax-section {
	margin-top: 74px;
	padding: 100px 0;
	background-image: url("//demo.studiopress.com/parallax/wp-content/themes/parallax-pro/images/bg-1.jpg"); /* set URL of default background image here */
	background-attachment: fixed;
	background-color: #fff;
	background-position: 50% 0;
	background-repeat: no-repeat;
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
	color: #fff;
	text-align: center;
}

.single-parallax-section h4.widget-title {
	color: #fff;
	font-size: 72px;
	margin-bottom: 40px;
}

.entry-header::after {
	border-bottom: none;
	content: none;
	display: none;
	margin: 0;
	padding-bottom: 0;
}

.single-parallax-section .wrap::after {
	border-bottom: 1px solid #000;
	content: "";
	display: block;
	margin: 0 auto 60px;
	padding-bottom: 30px;
	width: 25%;
}

.single-parallax-section .entry-title {
	color: #fff;
}

.single-parallax-section .entry-meta a:hover {
	color: #ddd;
}