From the extension:
Step 1: Open up the extension. Click on ‘Create a new demo'.

Step 2: Name your new demo and click on Save.

Step 3: Your demo has been created and is available in the platform, click on ‘open capturing menu;’ if you want to proceed with adding screens to it.

From the demos page.
Step 4: click on ‘Create new’ in the top-right corner and click on create a demo.

Step 5: Name your demo and click on Create.

Step 6: Your demo is now created.