How can I add a "show all" buttom in my category product page? ps:1,7

[Juan Rios1]

Can someone help me add a show all button here? I am switching form PS 1.6 to 1.7 and I don't remember if that's a native prestashop feature?

This picture is my current prestashop: which is test.riograndeboots.com.mx

 

And this is my old website that does have that show all button, but since it's in spanish, it says "mostrar todo" 

 

Any help is really appreciated