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Using the Synchronize Environments extension
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The Synchronize Environments extension allows you to apply a Python, R language
or any other custom environment inside your current notebook session, without
needing to start up several Notebook instances using each of the selected
environments.

To change environments:

#. Open the **Kernel** menu.

   .. figure:: /img/aen-user-extensions_kernels41.png

      ..

   |

#. Click the Change kernel option.
#. From the list, select the environment to use.

NOTE: In AEN 4.1+ the default kernel for projects is ``default``. In versions
prior to 4.0, the default kernel for projects is ``root Python``.
