Gallery Images
PRO feature: It activates additional images to show in gallery for variations in WooCommerce.
ADD IMAGES FOR VARIATION PRODUCTS
It is only available with pro version. You Buy that from here, In case if you are on Lite version.
- Open the variations tab of product
- You will see the blank product image, which is default from woocommerce.
- A new additional images button will be available which is plugin’s feature

- Click on add additional images to add unlimited number of product images.

- You can click on the image again to Remove the image from gallery.

- Drag & Drop images horizontally to order the images in gallery.