Prestashop 1.6 make a button that pops up an image

[Juan Rios1]

Hello, I'm starting to sell shirts, but I want to put a sizes chart. 

Since I don't have more room for pictures, I was thinking of adding a button that would show a pop up with the image.

Any ideas how to do this? I'm not a developer, but I've gotten the hang of some things.

Thanks in advance!

[Guest]

Will the size image be for all products?

[Juan Rios1]

No, it would only be for certain categories, if thats possible.

If it has to be on all products, I guess I'll just have to work with that.

[Guest]

It has become more complicated by categories.
To do this, the module would have to be done and created a hook for product.tpl
Because you would have to manually enter conditions into product.tpl

eg:

{if $product->id_category_default == 3 || $product->id_category_default == 11}
<img src="{$img_dir}/shirt-size-men.png" style="max-height:150px;">
{/if}