Ah, I thought you meant the title, at the top of the browser window, where the content of the HTML < title > tag is displayed!
In Safari, if you enable the Develop features, you can right-click on anything and select "Inspect Element" to get many of the features of the Firefox Firebug addon.
You can also get used to looking a the "view source" option in your browser (usually in the "View" menu of the browser's menu bar) to see what is actually being displayed.
This article may help you to understand how your MODx template is working. The "MODxHost" template is probably not the best one to use for learning, it's very old and always was rather obscure. I don't like too much cleverness in a template, it makes it harder to grasp exactly what it's doing.
http://sottwell.com/how-templates-work.html