The order of the pages and folders visible in the menu can be changed.
Click the top menu open and select Edit menu.
Change the order of the pages and folders by dragging and dropping them into the wanted order and after it is satisfactory click Close edit mode to exit edit mode and to save the rearranged page order.
Keep the most important and necessary things in the menu, and move the non-essential pages from the menu by dragging and dropping them to the Drag pages or folders here to hide them from menu area.
The pages are still accessible from the top menu List all pages view, and direct links to those pages work normally. Those pages are simply hidden from the menu, but still function otherwise as any other page would.
The pages not in the menu can be dragged and dropped back to the menu in this same edit mode at any time.