What you have to do first is populate each group with its users. If you are using global groups then you have to do this once. For example to add a user to the Gemini Administrators global group go to the Administration -> Global Groups and click on the group name. Now add the user(s) to the group. For Project Groups you add users per project. So if a user is in project group Developers for project X that user will not be part of that group for project Y unless explicitly specified.

Once you have your groups, go to the permissions page and set the relevant permissions to the relevant groups. When you have done that allocate the project to that permission set. That should be it.

I am not sure I understand

The problem comes in that I have to allocated the project to the creators/readers which seems to overwrite the persmission of the developer global groups.

I've done your first bit above, and it appear to make no difference to my issues. I will have a watch of the video and see if it helps.

The bit you don't understand - On the permission page there is a column for Project allocation. This appears to restrict the viewable projects to the permission groups, but you can only allocate one project to one persmission group, which I think is where overriding permission become and issue.

Any thoughs apprecaited

Cheers

Think I've got it sorted now.