Checkout: Configuration > Products & Images > Product Variations & Options« Products & Images
Checkout > Configuration > Products & Images > Product Variations & Options
You can choose if you would like the label/caption to be shown when a thumbnail is used on a radio/checkbox variation option by ticking the Show button. This is set when creating/editing the variation option.
Thumbnail Zoom Option
If you have set images on your variation options and you have the Zoom Gallery extension installed then you can “Enable” this option, it uses the zoom window to show the original dimensions of the image. If the extension is not installed, the option is “Disabled” and will use the pop-up effect for enlarged images.
You can choose the height and width of the variation options thumbnail images here.