This applies to GP10 only but if you need to print, let's say, a list of invoices for a customer, here's how to do that without having to open each document, one-at-a-time and printing them.
First, select the Sales series button at the bottom of the Navigation Pane. Then, further up on the Navigation Pane, select 'Sales Order Transactions'. A list of posted transactions appears in the results pane.
* click image to enlarge
Next, sort and filter the list to get the desired list results. Then, place a checkmark next to each of the documents you want to print. Click the 'Print Documents' button at the top center of the results pane ribbon. Each of the selected documents will print in sequence.
The Lists panes can also be used to print documents in any of the other series using the same process.
Thanks to my buddy Mariano Gomez (The Dynamics GP Blogster) for the suggestion for this tip!