As of September 2018, if you are looking at a capsule, you will see, on the top right of your screen, a 'Preview the new Code Ocean' button:

This will launch an updated version of Code Ocean.

This new User Interface is based on JupyterLab and has many of the features of that Integrated Development Environment.  

Over the next few weeks, we'll be updating to note some of these new features. 

In addition, you can now launch an Rstudio interactive session.

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