Jen, Thanks for all your quick responses. I have found Googling documentation for Galaxy extremely hard, because it is such a common term. How I wish it had been misspelled (intentionally)! I work in an informatics core, where several of us collaborate on projects. We have a local Galaxy installation. We are working hard to become proficient at Galaxy as we get deluged with NGS analysis requests. We recently tried to have two of us work in the same history, but did not succeed. I "shared" the history with my colleague, but he was un-able to use it directly. If he "imported" it or "cloned" it, it made a copy. Even when he "referenced" it, any new tasks he ran did not show up in my original history. I see there are a bunch of roles under history > options > "dataset security", but I haven't been able to figure out how to use them, or if they would help with this issue. We currently use Shibboleth for authentication, and have no groups or roles defined. I'm not currently an admin, but that will get fixed shortly. Is there a specific tutorial or page that covers this type of collaborative setup? I looked at https://bitbucket.org/galaxy/galaxy-central/wiki/SecurityFeatures, but still wasn't clear if I could achieve what I want with roles and groups. Regards, Curtis