In order to access Store Settings, firstly, on BackOffice's navigation menu, click on Settings -> Venues & Stores, then click on the store's name (if you have multiple venues).
Or, click on Settings -> My Store, if you have only one venue.
Next, click on the "Details" tab, then key in the information for the following fields:
Store Name: What you called your store
End Shift: You can choose on of the following values - By Store, By Device, By Employee
Sales by hour: Tick on this to receive sales amount per hour (???)
Daily Sales Summary: Tick on this to receive daily sales summaries via emails everyday
Shift Summary: Tick on this to receive shift summaries via emails
Email Addresses: You can select pre-added email addresses or create new ones in order to receive daily sales and shift summaries.
Finally, after you have satisfied, click on "Save" to confirm all changes.
Additionally, you can delete the currently-selected store by clicking on "Delete".