(I'm a teacher and I want maximise its usefulness.)
The best way to send to a remote computer to have it printed out, is open the collage then in the upper right click on the white square with the arrow icon. Select "Share via" as you will see, there is multiple options to choose depending on what you have installed on your device. It will send the file as a .jpg. I tested using via email, dropbox, bluetooth as all methods worked great. Then you can open .jpg file and print it as you wish. I did not see .pdf as an option, but if you have Adobe Acrobat you can open the file in Acrobat, then save as pdf file.
Hope this helps answer your question
One other note that I would like to add is that if you choose to upload the file to the Creative Cloud it does upload the file with a .colz file extension. When I downloaded the file to my mac I was not able to open that with Acrobat as its not a recognized file format for Acrobat. So sending the file via email would be best for you to print or use one of the other methods that I mentioned.
There is also this option http://forums.adobe.com/docs/DOC-1271#comment-1558
I tested this with a few of my files. If you want to just print the collage I would still suggest the methods above that i mentioned. It was just the easiest to do.