# Opening a Notebook Instance

You can open a created notebook instance (that is, an instance in the Running state) and start coding in the development environment.

#### Instance Opening

- Go to the Jupyter Notebook page.

  In the notebook instance list, locate the row where the target notebook instance resides and click Open in the Operation column or click the notebook instance name.

- Go to the JupyterLab page.

  In the notebook instance list, select the notebook instance to be opened and click Open JupyterLab in the Operation column.

Figure 1 Opening a notebook instance

#### Code Development

ModelArts provides two environments for code development: Jupyter Notebook and JupyterLab.

- Jupyter Notebook: a web-based application for interactive computing. It can be applied to full-process computing: development, documentation, running code, and presenting results.

Parent topic: Managing Notebook Instances