modify editor user role

gistfile1.txt

// allow editors to manage gravity forms
// allow editors to use Appearance menu
// allow editors to manage co-authors plus plugin, create guest authors
// allow editors to manage Privacy sub-menu under Settings

function dmc_modify_editor_role() {
	$role = get_role( 'editor' );

	$capabilities = array(
		'gform_full_access',
		'edit_theme_options',
		'coauthors_guest_author_manage_cap',
		'manage_privacy_options',
	);

	foreach ( $capabilities as $cap ) {
		$role->add_cap( $cap );
	}
}
add_action( 'admin_init', 'dmc_modify_editor_role' );