Authoring Studio Editor is where you will be adding the main content of your book. The editor is similar to Microsoft Word but has many extra features which help you create ePUB3 books.
As we are creating HTML5 content, it must be noted that behaviour of the editor might be a little different from what you are used to in days to day word processing products.
We have created a training vide which you can watch here, or just start it in below: