A text element can be added through the toolbar on the left side of the builder. All you have to do is drag and drop icon T.
Available text features
You can set any size for a text element. It can have shadows, transparency, and borders. All features explained in this article are accessible through Text edition panel, which can be opened by clicking on any text.
By double clicking text element, you can change content and its style.
You can choose a font from the fonts list. If none of them suits your project, you can easily add some more.