Quantity Item Option

I downloaded the DESKTOP EDITION, and I added an item to the inventory but I can’t find the option for quantity. Where can I edit the quantity of the items?

When you buy an inventory item using inventory on hand account it will add the number of items you have purchased to the inventory. Then you can go to the inventory tab and you will see the number of your item purchased against the inventory item. Make sure that when you buy an item, inventory on hand is selected for the account.