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<?php

// Content Archive Full or Excerpt
add_filter( 'genesis_pre_get_option_content_archive','cpt_change_content' );
function cpt_change_content() {
		if ( is_post_type_archive( 'testimonial' ) ) { // Add in your CPT
		return 'full'; // Other values - 'excerpt'
	}
}

// Content amount limited in characters to display
add_filter( 'genesis_pre_get_option_content_archive_limit','cpt_change_content_limit' );
function cpt_change_content_limit() {
		if ( is_post_type_archive( 'testimonial' ) ) {
		return 28; // Runs in accordance with 'full' set on content archive - returns limited character count
	}
}

// Show the featured image
add_filter( 'genesis_pre_get_option_content_archive_thumbnail','cpt_change_image_presence' );
function cpt_change_image_presence() {
		if ( is_post_type_archive( 'testimonial' ) ) {
		return 1; // 1 = display it, 0 = omit it
	}
}

// Size of the image
add_filter( 'genesis_pre_get_option_image_size','cpt_change_image_size' );
function cpt_change_image_size() {
		if ( is_post_type_archive( 'testimonial' ) ) {
		return 'thumbnail'; // Other values are any set image sizes as well as thumbnail, medium and large
	}
}

// Alignment of the image
add_filter( 'genesis_pre_get_option_image_alignment','cpt_change_image_align' );
function cpt_change_image_align() {
		if ( is_post_type_archive( 'testimonial' ) ) {
		return 'alignright'; // Other values alignleft and none
	}
}

// Pagination, numeric or text
add_filter( 'genesis_pre_get_option_posts_nav','cpt_change_pagination' );
function cpt_change_pagination() {
		if ( is_post_type_archive( 'testimonial' ) ) {
		return 'prev-next'; // Other value is 'numeric'
	}
}

<?php

// Archive Template - archive-custom-post-type-name.php

//  Modify the length of post excerpts
add_filter( 'excerpt_length', 'themeprefix_excerpt_length', 999 );
	function themeprefix_excerpt_length( $length ) {
		return 10; // pull first 10 words
}

// Set post display amount
add_action( 'pre_get_posts', 'set_posts_per_page_for_testimonials_cpt' );
function set_posts_per_page_for_testimonials_cpt( $query ) {
  if ( !is_admin() && $query->is_main_query() && is_post_type_archive( 'testimonial' ) ) {
    $query->set( 'posts_per_page', '3' );
  }
}



genesis();

<?php

// Archive Template - archive-custom-post-type-name.php

// Use breadcrumbs
add_filter( 'genesis_pre_get_option_breadcrumb_archive','__return_true' );

// Set layout to full-width
add_filter( 'genesis_pre_get_option_site_layout','__genesis_return_full_width_content' );


genesis();

<?php

add_action('genesis_before_loop','cpt_change_all');

function cpt_change_all() {

	if ( is_post_type_archive( 'testimonial' ) ) {

		add_filter( 'genesis_pre_get_option_content_archive','cpt_change_content' );
		function cpt_change_content() {
				return 'full';
		}

		add_filter( 'genesis_pre_get_option_content_archive_limit','cpt_change_content_limit' );
		function cpt_change_content_limit() {
				return 28;
		}

		add_filter( 'genesis_pre_get_option_content_archive_thumbnail','cpt_change_image_presence' );
		function cpt_change_image_presence() {
				return 1;
		}

		add_filter( 'genesis_pre_get_option_image_size','cpt_change_image_size' );
		function cpt_change_image_size() {
				return 'thumbnail';
		}

		add_filter( 'genesis_pre_get_option_image_alignment','cpt_change_image_align' );
		function cpt_change_image_align() {
				return 'alignright';
		}

		add_filter( 'genesis_pre_get_option_posts_nav','cpt_change_pagination' );
		function cpt_change_pagination() {
				return 'prev-next';
		}

	}
}

<?php

// Archive Template - archive-custom-post-type-name.php

add_filter( 'genesis_pre_get_option_content_archive','cpt_change_content' );
function cpt_change_content() {
		return 'full';
}

add_filter( 'genesis_pre_get_option_content_archive_limit','cpt_change_content_limit' );
function cpt_change_content_limit() {
		return 28;
}

add_filter( 'genesis_pre_get_option_content_archive_thumbnail','cpt_change_image_presence' );
function cpt_change_image_presence() {
		return 1;
}

add_filter( 'genesis_pre_get_option_image_size','cpt_change_image_size' );
function cpt_change_image_size() {
		return 'thumbnail';
}

add_filter( 'genesis_pre_get_option_image_alignment','cpt_change_image_align' );
function cpt_change_image_align() {
		return 'alignright';
}

add_filter( 'genesis_pre_get_option_posts_nav','cpt_change_pagination' );
function cpt_change_pagination() {
		return 'prev-next';
}


genesis();