I’m trying to print out my digital materials but my print button in Adobe Digital Editions is grayed out.

Your book may have printing limitations due to copyright restrictions or other factors. You can check the printing allowance by going to the File tab, “Item Info,” and see “Printing” permissions on the bottom of the dialog box.
Printing access is available only on the first computer where digital materials are downloaded. Subsequent downloads of your digital materials to other computers will allow materials to be viewed through Adobe Digital Editions, but not printed. If you first downloaded your book to a mobile device, you will not be able to print from another computer.
If you feel there is an error with your printing allowance, please contact us at orders@cognella.com or 858-800-2675.