Collaborator accounts

As a Shopify Partner, you can use collaborator accounts to access merchant stores directly through your own Partner Dashboard or using the Shopify app. Collaborator accounts give you access to only the sections of a store that a merchant wants you to access, and don't count toward a store's staff limit. Any stores that you have access to by using a collaborator account are labeled as Managed stores in your Partner Dashboard.

If you're building or customizing a theme for a merchant, then you can use a collaborator account with the Themes permission to create and manage themes in the merchant's store.