Hello there, nonameplease.
 

I agree with bruno-tomesch's suggestion. You can print multiple invoices through the Income Tracker. However, as you noticed, invoice transactions from there are classified as Open Invoices, Overdue, or Paid Last 30 Days. Thus, you'll need to manually select all the invoices that you wish to print in batch. 

Here's how:

1. Go to Customers tab.
2. Click on the Income Tracker.
3. Choose Open Invoices, Overdue, or Paid Last 30 Days tab.
4. Select all the invoices under each tab that you want to print.
5. Click the Batch Actions drop-down and choose Print Selected.

The steps above is considered to be one of the options in printing multiple invoices aside from manually checking the Print Later box in each of your invoices.

All the help you need can be found here in the Community, so don't hesitate to let me know if you have other concern. I'd be glad to help.