Display Limit Menu Items with auto

Is there a auto display menu items with for Limit Menu Items. The display for guest and user login are not the same space and width. Now it is public for guest so we can set 6 for menu item, and we think it is good for guest but when user login, the menu items can display at top and user profile can go down because of width of module position.

Please consider a new feature it is available that I don’t know.

Please look at my attachment file. I must set Limit Menu Items : 6 to fix it when user login so why I ask a new features for Limit Menu Items.