In Basic, the Layers panel shows the main chart layers and two panes below the chart — cumulative delta and open interest. Pro shows everything else: the bar scanner, session profile, footprint, historical analogs, metric overlays, coin comparison and more.
The switch is at the top of the Layers panel, next to the layer search. Going from Pro to Basic hides the Pro-only layers but remembers them; switching back restores everything. Layer settings are not touched.