Populate icon if field is not-null
My goal is for Filemaker Pro 10 to automatically populate a 'clickable' icon if a field is populated. For example, if I had a field named 'Amazon_link' and I were to populate it with a link to an Amazon.com profile for a product, then Filemaker would display an Amazon icon in which if the user were to click on the icon it would take them to the Amazon.com page displaying the product.
I think it might be a function with maybe an IsValid operator but I'm struggling and haven't found anything when searching the forum.
Thank you for your help.