In some cases, when you prepare a journal entry, you need to specify better some information concerning an account that is too generic. Think of Accounts Payable, for instance: if you have several customers, how could you keep track of the amount you owe to each of them?
Welcome subchoices, a new feature of LearnDoubleEntry.org.
Whenever you are editing a journal entry, you can add a @ symbol after the name of the account. If you do so, when you press the tab key you'll be offered a field where to write a subchoice.
In the ledger, you will find the subchoices listed for each posting: