Superstore includes a customizable Quick shop feature, which is a stripped-down version of the product page used by customers to add products to their cart without leaving the page.
Enable the feature in the Theme settings, then customize the quick shop window's content by opening the template in the theme editor.
Enable in Theme Settings
Open the Products portion of the Theme settings to select an option from the "Quick shop" button dropdown.
Select Enable on desktop and mobile to activate the feature for all devices. To limit to desktop devices only, select Enable on desktop only. Select Disabled to deactivate the feature.
Customize the Template
Use the page selector to open Products, then quickshop.
Use the provided page blocks to customize the layout of the product's Title, Vendor, Price, Product rating, Form, Share buttons, and Description.
Use the View full details block to customize the position and text for the product page link.
Click (+) Add block to include a Custom liquid, Text, or SKU block.