Right now we have to add details like (item name, quantity and price per unit)of the items sold and purchased manually in the default description box(Sale invoices /Purchase invoices). to be appeared in the customer/supplier statements
It will be much less hassle to have a toggle on off option to auto fill default description box with the items sold/purchased (item name, quantity and unit price) in Sale Invoice and Purchase Invoice (to appear in statements precisely)
None of the content you mention belongs in either the summary-level
Description field of an invoice or the line-level
Description field for a line item. Item name, quantity, and unit price all have their own separate fields.
Further, customer and supplier statements do not report line-items. They list transaction-level totals only.
It is not clear what you actually are doing, but it sounds like you only use invoices with single line items.
I understand statements are transaction level totals. Although I need description of items with transaction totals in the statement. Like a customer ledger which includes all detailed summary of items (name, qty, unit price) and transactions with totals.
There is no way to obtain that in a Customer Statement. As you know, based on your post in another thread, a suggestion to add that capability was added to the ideas category by the developer over three years ago.