Please bring back the option to use the arrows to navigate the previous/next invoices in the customer record, rather than looking at the prev/next invoice in the numbered sequence.
This was invaluable when having to quickly scan previous invoices created for a customer to see if something was charged in an earlier month / how we invoiced something previously / how payments have been allocated and what is left on account etc.
It wastes a lot of time having to go back to the central customer invoice screen each time and then select the next invoice.