How to: Print more than one file at a time.
Solution:
Press and hold down CTRL while selecting the files to print from the 'File', 'Open...' dialog box. Click 'Commands and Settings' toolbar button.
1) Select the 'File' menu and select 'Open...'.
2) Press and hold down CTRL while selecting (clicking on) the files to be printed.
3) Click 'Commands and Settings' toolbar button.
Commands and Settings button
4) Select 'Print' from the submenu.
5) Select the desired print options.
6) Click 'OK' to print.