For more information check out This Guide.
From Inventory>Stock Transfer hit + New Transfer. Select the From Warehouse that has the available stock and the To Warehouse you want to send the items to.
2. Search for the products you would like to transfer by either Product Title or SKU. Then enter the quantity of the items you would like to send.
3. Select the Status of your transfer and hit Create. (Check out the table below for more information about each status)
When viewing the Product Summary of an item that is being transferred you can see the amount of stock that is transferred.