As a seller you can get to determine what modes your customers can see on your store and also select what the default mode should be, we’ve enabled all three modes by default.
To manage modes:
Step 1
Log in to your dashboard
Step 2
Open the side navigation and click on Store settings
Step 3
Click on Store configuration
Step 4
In the store configuration, scroll down under Customizations to Store View Mode.
Step 5 Click on Update Configuration
Grid View (Default mode)