The variant selector element in Product pages is created to display your product attributes such as sizes and colors. Our product variant selector has two types --- button and a dropdown list. It is very important to make certain that the characteristics of your products are easy to view and select as it will lead to increased sales and a hassle-free shopping experience.
Go to your Shopify Admin and select Online Store.
Select your 3.0 Theme, and click on Customize.
On the top menu, select Product pages from the drop-down list.
Under Product pages, click on Product pages.
Scroll down the sidebar menu until you see Picker type. Click on the drop-down list and select your preferred picker type.
Click Save to apply changes.