Additional Discount Column in Estimates, SO and Invoices

Additional Discount Column in Estimates, SO and Invoices

Hi,

We pass 2 type of discounts in the invoice. Trade Discount and Project Discount. We would like to track these discounts separately. Right now Zoho Books has the option to have discount column in each item line or another one at the bottom, before tax. We use only the Discount column at the bottom in the transactional level. Can we have an additional discount column in Estimates, SO and Invoices at the bottom ? It also needs to be reflected in the Print outputs. 

We have an adjustment column but it appears after tax. 

Thanks a lot