In our March 2012 release, we updated the user interface for photo libraries. In order to help answer some questions - here is an FAQ to help out.

Why did you update the Photo Library user interface?
Our goals were to, eliminate pop-ups, increase usability on touch devices, decrease page and photo load times, quickly print all photos and enable uploading of single or multiple photos via email.
How do I access the photo libraries and thumbnails? Same as before.
From your project, hover your mouse over Photos on the project navigation, then select desired library.
How do I view all thumbnails on one screen?
Under the thumbnails, select ‘show all photos.’
How do I scroll through the large photographs?
Select a thumbnail or the right and left arrows that appear when hovering over either side of the large photo.
How do I print a single photo? Right click on the image you wish to print.
Save image to your desktop. Print Image.
How do I print all photos in a slideshow?
Select Edit button in the upper right corner. Select ‘Download as PDF’. Print PDF
Can I hide the film strip when looking at larger photos?
Under the thumbnails, select “Hide Filmstrip.”
I’m in a slideshow, how do I get back to the page where I can view all photo libraries?
While viewing your slideshow, select ‘return to list’ located under the Edit button.
Can I download all of the photos?
Select Edit button in the upper right corner. Select ‘Download as Zip’.
How do I create a photo slideshow from email?
Obtain the create photo slideshow email address by selecting ‘Create Photo Slideshow via Email’ on the photo library list page. Drag photos into email, enter subject and send.
How do I add a photo to and existing photo slideshow from email?
Obtain the update photo slideshow email address by selecting ‘Upload Photo(s) via Email’ on the photo library context menu on the photo library list page. Drag photos into email and send.