In the "All invoices" section you need to add a button to "mark as paid" when you have ticked several invoices (no matter which contact these invoices belong to). I cannot go into each contact to mark it as paid as, firstly I haven't got time for that, and secondly I have HUNDREDS to do. this option is absolutely necessary and it must be added as soon as possible. Please consider this to be added otherwise I will have to go back to freshbooks.