From the invoice groups (Billing > Groups > Invoice Groups), select the 3 dots in the upper right corner of the group card.

Select GENERATE BULK PRINT DATA

A pop up will indicate that the data is generating.

Once the data has generated, the printable view option will be selectable.

Select all or specific invoices to be printed.

Select the printer button.

The invoices will print in 100 page groups. When the print button is selected the check mark will turn green to indicate that the print has been initiated for that group.

Additional details:

The page number at the bottom indicates the total invoice pages. You can enter a page number in the box or click on the page number. (If you're looking to print just one invoice)

You can expand the details of the invoices in the batch

You can select multiple invoices by holding shift key