To update multiple stock numbers at the same time:
Go to Products > Product List.
Look to the top right of the page and click on the More button.
Select Inventory from the More Button drop-down.
This page will provide you with a list of all of your products (up to 150 at a time). Each product will be listed with the following:
The Product's small thumbnail image
The product's ID/SKU information
The name of the product
Stock Level Indicator
If the product has a stock alert number specified, this indicator will show you how far away the product is from triggering the alert email.
This open field can be used to update the product's inventory. For products that are using Advanced Options, you will see the product's cumulative inventory followed by each separate variant to update it.
This field can be used to specify the product's stock alert number. When the product's inventory drops below this amount, a stock alert email will be sent to you to notify you that the item is running low.
Use this checkbox if you would like to mark the product as a Featured Product on your store's home page.
This checkbox can be used to hide items as needed.
4. Click Save at the top right to commit your changes.