To activate Odoo Studio:

1. Login to your Odoo instance with an admin account.
2. In the top right corner of your screen, you'll see a "Studio" icon (a wrench and screwdriver symbol).
3. Click the Studio icon, and it will activate the Odoo Studio interface, allowing you to customize the app.
4. Once activated, you can edit views, add fields, and customize reports.

To deactivate Odoo Studio:

1. When you're in Studio mode, click on the "Close" button at the bottom right corner of the screen (it will be labeled something like "Exit Studio").
2. This will take you out of the Studio interface and back to the normal Odoo environment.