As participant/'deelnemer' on openresearch, you have access to the 'pink' layer: the documents that have been shared within the platform. To add or publish material yourself, you must first be given access by an editor. This can be done either to make you part of a project/workspace or to make you owner of a certain article or collection. If neither is the case, you can just view and access articles instead of doing something yourself.
To see whether you have been added to a workspace, go to How to reach your workspace.
To see whether you have been added as owner of an article or collection, go to your profile page. Here you can find material with your ownership under 'geschreven werk'.
You can find your editor by going to the collection beloning to your organisation/department on openresearch. The name(s) at the top of the page is/are your editor(s).