Can I edit metadata in OMERO?

This is a long and thorny question. Currently, using the standard OMERO clients (OMERO.insight and OMERO.web) the answer is "No". However, following significant discussion with the community, we intend to provide a facility that stores the original metadata, as first loaded during import, and then the latest version of the metadata, including the latest version of edits from a user.

There is nothing to stop developers writing their own clients (using the OMERO API) to edit metadata on the server.