Source

File: wp-admin/includes/class-wp-screen.php

public function render_view_mode() {
		global $mode;

		$screen = get_current_screen();

		// Currently only enabled for posts and comments lists.
		if ( 'edit' !== $screen->base && 'edit-comments' !== $screen->base ) {
			return;
		}

		$view_mode_post_types = get_post_types( array( 'show_ui' => true ) );

		/**
		 * Filters the post types that have different view mode options.
		 *
		 * @since 4.4.0
		 *
		 * @param string[] $view_mode_post_types Array of post types that can change view modes.
		 *                                       Default post types with show_ui on.
		 */
		$view_mode_post_types = apply_filters( 'view_mode_post_types', $view_mode_post_types );

		if ( 'edit' === $screen->base && ! in_array( $this->post_type, $view_mode_post_types, true ) ) {
			return;
		}

		if ( ! isset( $mode ) ) {
			$mode = get_user_setting( 'posts_list_mode', 'list' );
		}

		// This needs a submit button.
		add_filter( 'screen_options_show_submit', '__return_true' );
		?>
		<fieldset class="metabox-prefs view-mode">
			<legend><?php _e( 'View mode' ); ?></legend>
			<label for="list-view-mode">
				<input id="list-view-mode" type="radio" name="mode" value="list" <?php checked( 'list', $mode ); ?> />
				<?php _e( 'Compact view' ); ?>
			</label>
			<label for="excerpt-view-mode">
				<input id="excerpt-view-mode" type="radio" name="mode" value="excerpt" <?php checked( 'excerpt', $mode ); ?> />
				<?php _e( 'Extended view' ); ?>
			</label>
		</fieldset>
		<?php
	}