Add an image to Paypal shop categories

Hi,

Is it possible to add an image for each category listing? I have tried to add the below code: <img src="<perch:shop id="productImage" type="image" class="img-responsive" crop="true" />" alt="<perch:shop id="productTitle" /> to the cateegory_link.html page but no image input shows up in admin.

Could you please assist me.

Thank you in advance.