I am using SilverStripe to publish content on my website which is basically a blog. I'd like to format certain bits of text in a specific way so as to, for instance, add a Wikipedia-like external link image to some <a> tags or add a class to <span> tag so that the text can have a dotted underline. For that, I'm used to using CSS.
The problem is that when I enter text on new pages, I don't see anywhere a possibility to switch from the WYSIWYG rendering to a Source rendering in order to edit the HTML tags and add the CSS identifiers that I want to add. I've read the help documentation, including Creating and editing content page but there' no mention of it in there.
Thank you for your help.