No Add To Cart Button

Hi everyone,

I update 3.0.6 to 4.1.5 and use responsive skin but i cant find on categories and home page ADD TO CART button!

How can i added in tpl? and how?

Thanks for helping

[color=#000000]design\themes\Theme-Name\templates\blocks\list_templates under of the grid_list.tpl file. Paste TOP, bellow code [/color]

[color=#000000]CODE : {assign var=“show_add_to_cart” value=“true”}[/color]