[GNC] How to "Get Quotes" for a specific day?

How can I tell GNU Cash to update its "Price Database" for all known currencies, stocks, bonds, mutual funds, etc for a *specific* day? I'm trying trying to prepare a report for a date in the past. I've set the `Options` for the report to `nearest in time` so that it will grab the prices for th

[GNC] Add top-level account for both Income (Revenue) and Expenses (Other [Non-Operating] Income And Expenses)

How do I create a top-level account in GNU Cash that can hold both Income *and* Expenses in its subaccounts? IFRS (and US GAAP) don't directly publish example Chart of Accounts, but I find it common to use some standard top-level account number prefixes. For example: * https://en.wikipedia.org