In the photo viewer multiple photos can be selected at the same time, but they can not be edited. When multiple photos are selected the "filter" dialog should be hidden and the combined properties for the selected photos should be shown (the same as it is in Revit). With multiple photos selected the location and tags should be able to be edited.
Tags and locations are very powerful tools, but are a hard to use when each photo (and there may be hundreds taken in a visit) has to have tags/location set individually!!! It becomes a very time consuming and laborious process to make use of the feature.