How do I swap image on hover
In your shopify Admin panel, under THEMES & SETTINGS section in the left sidebar menu, click on the "Theme setting"
After this, all theme settings page will appear. In this "Product item" section available. Under this "Image swap on hover" with checkbox visible.
Checked mark this...
Once you done with all settings, Click on the "Save settings" button.
Your settings will be saved successfully.
That's all done.