You are already on the main screen of Super Space.

Click More.

Select Show Whiteboard.

The whiteboard screen will appear as the main screen.

Use various whiteboard features such as:

To enlarge the view, click the icon (←→) in the top left corner and click the icon (→←) to return.

To switch the main screen while keeping the whiteboard active, click the icon (⋮) in the bar → Pin to top. To revert, click View Whiteboard.

To close the whiteboard for all participants, click More → Hide Whiteboard.

In Pin to top or Hide Whiteboard mode, writings on the whiteboard will not be erased unless removed with the Eraser.

See Access Types for this feature.