InventoryPlus user preference supports list customization. You can add or delete not required fields from sales screen. In case if you want to add column like Discount % instead of Discount amount then you can do it as you like. Do you want to hide the not required column? then you can do it using our unique field choose feature.
This feature is enabled across the application so you can hide or show the fields according to your requirements. You can arrange the fields as per your requirements as well. System will save the state after changes so in future if you come to same screen your changes will be retained.