There appears to be no way to delete obsolete pictures when setting up a Report. Previous STAAD files are commonly used as a template for the next project, so as to avoid setting up new units, etc. The picture album becomes unwieldy without the ability to delete pictures.
Previous versions had this capability.
This functionality was added in the STAAD.Pro 2023 minor 2 release.
Thank you for posting this idea. There are certainly a number of ways in which we can improve the new User Report tool and agree that having a facility to manage and remove pictures taken during the life of a model is one and should be provided so added to the backlog.