In case you had issues about image size right inside the quick view, we suggest you to regenerate all thumbnails
of the products of your shop.
The plugin default behaviour implies for all product thumbanails to be shown in a classic mode, as provided from WooCommerce. However, you can choose to show them with the “Slider” typology or completely hide them.
When “Use custom HTML thumbnails” option is active, the plugin use its own custom template to show product images in the quick view, instead of WooCommerce standard ones. This lets you avoid possible layout issues, as often themes overwrite WooCommerce templates, causing quick view contents to be displayed irregularly.