When managing the payment and collection of items, within the Invoicing screen, it is useful to know that both the Collected and O/S Balance columns can be colour coded by the Invoicing manager.
To do this simply click within the column:
Once to show as Red
Twice to show as Amber
Three times to show as Green
Four times to revert back to a non-coloured display
This feature could be used to easily show items that have been paid in full, partially or not at all, Items that have or have not been collected or perhaps used to indicate the urgency of a required payment.
See the image below as an example of this feature: