In this tutorial we'll build an add-on that uses many of the SDK's high-level APIs.
The add-on is an annotator: it enables the user to select elements of web pages and enter notes (annotations) associated with them. The annotator stores the notes. Whenever the user loads a page containing annotated elements these elements are highlighted, and if the user moves the mouse over an annotated element its annotation is displayed.
Next we'll give a quick overview of the annotator's design, then go through the implementation, step by step.
If you want to refer to the complete add-on you can find it under the
examples directory in the SDK.