The right sidebar contains watchlists, movers and news which you can open and close by clicking on the icons.
You can choose to show Tickers and Company Names, or a more compact view of only Tickers.
When looking at a Watchlist in the right sidebar, you can choose which field displays by clicking on the settings icon.
You can click on the securities in the right sidebar to load them into Koyfin functions like Snapshot (S), Estimates (EST) or Graph (G).