(NOTE: This article is for users NOT using the Stock module)

To mark items as "In Stock", go to the Purchasing page while in a project:

Items added to the project will be listed on the Purchasing page. On this page, you can see the status of each item. To mark an item as "In Stock", select the item checkbox and select the "Mark in Stock" button. 

Once an item is marked "In Stock" it will be labeled as "In Stock", instead of "Not Ordered''.

Let us know if you have any questions!