{% if collection.handle == "all" or collection.handle == "tartar-care" %}
Instead of all, you can use the old template contains “collection” code. But in this case, it will show in all collections. So we specified all. You can change it as you want.
For the product page, you need to use a different code. For example, inside product-template. liquid:
{% for collection in product.collections %}
{% if collection.handle == 'tartar-care' %}
// here inser logo
{% break %}
{% endif %}
{% endfor %}
@Anonymous thank you! I need help with another small thing, maybe you are able to help me with your amazing skills again. I need the logo from “tartar-care” to link to the tartar-care collection (https://tartar-berlin.com/collections/tartar-care) and all other logos should link to the index page (https://tartar-berlin.com). Right now there is this in the code that is linking the tartar-care logo back to the collection but the logo (see screenshot) on the other parts of the page doesn’t link anywhere.