From Carleton Moodle Docs
The usual way to edit or create text that is part of the visual content of a course is using the Text editor (also known as the HTML editor).
The way to edit the text in the content area, depends the current role or permissions of the user in a context.
- A teacher will see many ("edit settings") icons on a course's home page when "Turn editing on" button has been clicked. Or they will see the HTML editor and content area within many activities and resources. For example, a teacher can edit the text that appears at the top of a section in a course by clicking on the edit hand icon.
- A student and a teacher will see the HTML tool when they reply to a forum post but will not have the ability of changing a topic heading in the course.
Editing text example
Text editing on a Moodle site
Teachers and administrators should be aware that the Moodle code contains "strings" of text that can be edited though customising the language on a site wide basis.