Styles and layout are an important part of the user experience, and contribute to the usability of multimedia products (eg websites) and user engagement. Look and feel contributes to user (in this case, student) engagement. FLO has various tools that facilitate structure and layout.
The HTML editor is available in any activity and resource (Description field). The toolbar for the HTML editor has many functions (create heading styles, create text styles, add an image, embed a video etc).
In FLO, you can Add an activity or resource to the topic site. Resources include the following, and contribute to the organisation/structure of the site. They can be a form of 'sensemaking' for a user (ie student) – providing 'containers' for content that make navigation easier.