How do I create a Watchlist in IBKR Mobile?

From an existing Watchlist, tap the "+" to the left of the first Watchlist tab. Name the Watchlist and add instruments. 

Additional Information

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How do I see watchlists in Client Portal?
How do I delete a Watchlist in IBKR Mobile?
How can I add a ticker to a Watchlist in IBKR Mobile?
How can I add a ticker to a Watchlist in IBKR Mobile for iPhone?