The Text Editor app uses software designed like a word processor so you can add content that is rich in design without needing to have any knowledge of HTML code.
You'll find features for changing text style and size as well as for adding images, hyperlinks, tables, and many more.
There's also a "Source" button you can click on if you are familiar with HTML code and you want to make some adjustments using your own code.
Images that you insert in this app will not automatically scale to fit the width of the column where you place it. You can adjust the width of an image after you upload it to make it the exact size you want.