To see a list of available users in each group, select a group listed in the Group pane. The available users will be displayed in the Users pane below.
Groups: A group is a list of users that has been predefined by your DM administrator. When granting other users specific rights to a document, you can add an entire group or choose specific people from within an expanded group list.
Users: A list of individual users available to be granted rights to the document.
After all users or groups have been selected and added to the Current Trustees list, you can then define the level of rights to be assigned to each user or group.