Not a 100% sure what you mean by “Featured in Product Data” but you might be asking how to set a product as featured? In that case, just go to the product listing and click on the STAR icon next to each product.
Hi did what you said, but I still can’t get that Main Picture to show on in the featured product box. There simply is no option allowing me to upload the featured image. I followed your advice by going to admin, products, add product/ Publish, Edit: visibility Catalog: Catalog/search, featured. But no side bar appears to actually upload the featured image.
I am using a theme called U-Design and I would really love it if I can continue to use that theme with the WooCommerce plugin.