The invoice header columns should stay fixed/frozen as you scroll line items

In the new invoice interface, when you have a large number of line items (say 50 line items) as you scroll to line items to adjust anything in them (category, description, rate, qty, tax, etc) you need to continuously scroll back up to the top to understand/confirm what column you are about to change.

If you have a large number of changes, this becomes a very frustrating experience for users.

Suggestion:

• Freeze the column headers
• Allow users to scroll the item details while keeping the headers at the top
• Have options if you need to show the totals or the invoice header details. Sometimes you want to adjust the invoice header (customer, dates, numbers, etc) and sometimes you want to work on the line items or apply a global discount in the invoice footer. they are different user experiences.