Direct link to the shopping cart

My products direct customers to the shopping cart as they should.
How can I add a link/menu so they can get back to the shopping cart after doing some additional shopping?
I'm new to this so please provide all the details.
Thanks.

Hi,

You can change the value of the option "After a product is added to the cart" to "Display a popup notice", or just fill the url for the option "Continue shopping button's URL".

The first solution display a popup when a customer add a product to cart, this popup allow to continue shopping or go to the checkout.
The second one is to display a continue shopping button in the cart.