Currently the navigation within the Photo tool is quite limited in that you can only sort the photos and search within the tags and labels. If you are wanting to scroll through the list it can be quite tedious in that you have to keep selecting "Show More" to expand the photo options (see below);
This also presents problems when you expand a photo to markup etc, as when you close it will default back to the start of the list. It would be good to have the ability to select "Show All' or view in a list view as well as be able to search by Date./Source/Author etc.