In Chapter 5, Customizing Elements with CSS, we dealt with CSS code and we worked with some online editors which helped us with the coding. We can do plenty of things with coding and it would take an entire book or another chapter to edit CSS code. What we must bear in mind is that there is a block that allows us to use CSS code in order to edit what we need or desire. In most cases, HTML code is appropriate since it is also possible to edit HTML code when we add an activity or resource.
We have already dealt with CSS code in Chapter 5, Customizing Elements with CSS, and we can explore the resources in said chapter to improve and change the look and feel of the Moodle course. We have to bear in mind that we need a CSS block that allows us to edit such code, as was previously explained in said chapter.