The engine can only display so many items in each menu, yes. You can do pagination, but then you'd need to lose a few rows for the navigation buttons. What kind of menu are you building that requires 25 entries? For more complex tasks, do presentations or even branching/repeat_for dialogs. If you must have them all on the same page, you can have it direct to different results when the user holds another key while clicking (I use this method to toggle between talking to and trading with merchants).