However in Concrete5.5 the tutorial doesn't work and the toolbar is missing from the top of the page.
It turns out the guide is for versions of Concrete5 previous to 5.5 but that it is easy to fix.
In version 5.5 when you"Make a template editable" by adding the following php
<?php Loader::element('header_required'); ?>
to your default.php file you aslo need to add the following php
<?php Loader::element('footer_required'); ?>
just above the closing body tag of your HTML in default.php.