Open Customer Portal. On the Portal Editor tab, click Customize portal, then Settings, and under Portal choose where customers manage subscriptions. Switching asks you to confirm and applies after you save. If you switch, update any links you've added.

Manage Subscription Button tab: with Shopify's classic customer accounts, Appstle adds the button to your theme's account page. If your theme isn't supported, add the Manage Subscription Link block in your theme editor, or paste the snippet into your theme code.

With Shopify's new customer accounts, add the Manage Subscription button in Shopify's checkout and accounts editor.

Customer Portal Login: customers who aren't signed in enter their email and get a secure link to their subscriptions. Copy your login page link, preview the page, and add it to your store menu.

Access: Allow customers to manage their subscriptions without login turns the login page on; untick it, and signed-out customers see a message instead. Login email wording sets each text on the page, in every language you offer.