To change it, go to the Settings page -> Data tab.
When menu item is a segment and you select a large date range and/or many shops, charts may display too many menu items to be readable. This setting allows you to apply a maximum number of menu items to display on one chart or table. By default this value is set to the top 10. For example, if a chart shows Total Pre-Orders Quantity by Menu Item for the past 28 days, the displayed data would include only the top 10 menu items ranked by Total Pre-Orders Quantity over the entire 28-day period. If you prefer not to limit menu items, please activate the "No Limit to Menu Items" toggle.