- Currently, you can turn on / off the notifications of a particular issue or merge request by toggling the toggle in the object's sidebar. - There is no way however, to do this management in a bulk manner. You can't see which issues you are subscribed to altogether. So if someone wanted to manage that one by one, they cannot do that. - There are technical difficulties to achieve this since there is the concept of implicit and explicit subscriptions under the hood (technically), even though this is not user-facing. - The use cases are highlighted and technical difficulties are highlighted in here: https://gitlab.com/gitlab-org/gitlab-ce/issues/12697