Invoicing in Zoho Books

Invoicing in Zoho Books

Is there a way to include all unbilled hours for multiple projects when creating an invoice for a customer?  Let's say I have a customer and have 5 projects working for them.  Each of these projects has unbilled hours.  Is there a way that when creating an invoice for this customer that I can automagically include all of the unbilled hours for each of the 5 projects on a single invoice with one-click?  Freshbooks has this ability.  I love using zoho and would love to have this function as well.

Thanks in advance for your help.

John