Hi, I changed the option "After a product is added to the cart" to display a notification popup to the user and it works OK. It was not necesary to change the option "Force a menu on checkout".
The problem now is that I do not want to show a popup each time a product is added. I try the option to stay or go to the checkout based on the cart module being displayed or not.
In this case the problem is that always go to the checkout, independent if the cart module is displayed or not. In my web the cart module always is displayed.
I hope this help you to help me. At this moment i was using the option display a notification popup with the Notice popup display time= 0, but the popup is displayed for a short time.
Many Thanks,