How to add the Product Reference in the Back Office Product Toolbar ?

[patrmich]

Hello,

My shop is built with Prestashop 1.5.6.2.

In the Back Office, on the Page product, the Toolbar displays the following :
Catalog > Products >  Edit (Product Name)

I would like to display the following :
Catalog > Products > Edit (Product Name, Product Reference)

Would you know how to add the Product Reference in the Toolbar ?

I thank you in advance for any reply.

Patrick