How to show the stock quantity of Committed Stock and Available for Sale in the Item Overview view?

How to show the stock quantity of Committed Stock and Available for Sale in the Item Overview view?

Hello Zoho Community,

I am testing the Zoho Inventory app now and so far I am satisfied with it. However, I would like to see if I can at a glance on the Item Overview page to know how many quantity of stock is committed to sales order, and how many is available for sale. I understand such information is available at the Item detail page 



However, I believe it would be great if I can see this info w/o going into the Item detail page. I tried to click the top left icon on the Item Overview page to open the "Customize Columns" dialog, however, I don't seem to see these two fields available. I can see a custom field added by me, i.e. "Family", but I couldn't see the two fields I want. 


I tried to type in the search box but no result return.



Could anyone advice how if this could be done?