How to record invoices and read the roll-up

Invoices make a party's expected cash specific and dated, and sum into a per-party roll-up.

1. In the environment, add an invoice: sales (money in) or purchase (money out), with an amount, an issue date, and terms (net-N) or an explicit due date.
2. Open the invoice roll-up for a window: each party shows its summed expected amount from open invoices due in that window.
3. Drill down from a roll-up figure to the constituent invoices behind it.
4. Record a payment against an invoice to tie it to the actual that realized it; paid invoices drop out of the expected roll-up.

In-app documentation, version 5. Generated from the product documentation source, so this matches the app exactly.