To configure Variation Swatches for WooCommerce Navigate to WordPress admin menu WooCommerce =>Settings =>Product Swatches=> Advanced
WooCommerce =>Settings =>Product Swatches=> Advance
1) Clear on Reselect: Clear Selected attributes when select new attributes.
2) AJAX variation threshold: You can set total variation from her by default WooCommerce support 30 variation set. If you have 100+ variation of a product then please increase this no as you need otherwise in detail page variations will not display.
3) Out of stock for variation: Check to disable out of stock for variation product attribute item
4) Variation URL(new): Check it if you want to show variation attribute in url.
5) Attribute Behavior: Set image attribute behavior