When you sign in to Retail POS for the first time, either after downloading the app or updating to a new version, you need to select a shop and register. This officially assigns them to your iPad to make sure that sales and refunds are going to be processed in the correct shop and register when different employees sign in or enter their PINs. The shop and register that you assign to your iPad also display at the top of the main menu and at the top of the Sales screen.
To change your shop and register after this initial sign-in, go to Manage Registers and explicitly select the shop and register you want to assign to your iPad:
From the main menu, tap Manage Registers.
If you have multiple shops, tap your shop.
Tap the register you want to assign to your iPad. This enables the Lightspeed logo at the top left of the Manage Registers screen and allows you to navigate freely in your account.