How-to
How do I write a rich text lesson? (editor blocks)
In short
Choose Rich text for a chapter, then write like in a document and add blocks such as headings, images and callouts.

In the Curriculum tab, open a chapter and choose Rich text.
Click in the page and start writing.
Click Insert to add a block, such as Heading 1, Bulleted list, Image, Video, Callout or Table. You can also type / to open the same list.
Click Preview to see what learners see. Click Edit to go back.
Click Save, or press Ctrl+S.
Good to know
Nothing saves on a timer. The text next to Save tells you if there are Unsaved changes.
Paste or drop a picture into the page to upload it.
More has strikethrough, colours, highlight, fonts and alignment.