Changing inventory quantities
When you use multiple locations, you can update the inventory quantities from the Inventory page or the Product page. If you need to update the inventory quantities for a large number of products across locations, then you can use a CSV file.
If a product's inventory quantity is tracked using Inventory apps, then its quantities will be allocated only to that app location. You can change the locations products are assigned to.
When you have multiple locations, a location filter appears in the Shopify admin on pages and sections where it applies, such as the Orders page and the Inventory page. When you select a location in the filter, the page keeps your selection until you change it. The selected location for a page is stored in a browser cookie, so it isn’t maintained between devices or browsers.