Geppetto has a modular architecture that allows to visualize and interact with the data through different widgets. Widgets are an essential aspect of the user interface of Geppetto. You can imagine them as “at-a-glance” views of data and functionality that is accessible right from the browser. Users can move widgets across the screen, resize them and interact with their functionality through their API or the provided UI.
Widgets are normally created using the user interface, to create one manually from the console the following API can be used
G.addWidget("PLOT")
or
G.addWidget(0)
For more information see the documentation related to each individual widget. If you are interested in contributing a new widget to Geppetto you can follow this tutorial.