01. From your Shopify admin dashboard, go to Online Store > Themes.
02. Find the theme that you want to edit, and then click Actions (three dots icon) > Edit default theme content.
You can remove the “Powered by Shopify” message if you don’t want it to appear in your store.
03. In the Filter items box, type powered.
04. In the Powered by Shopify box, use the space bar on your keyboard to type a single space. You can repeat these steps for the Powered by Shopify HTML box, which appears on your store’s Opening Soon page if your store is password-protected.
05. Click Save.