I removed Users group from Everyone organization. Now many entities are not found, as expected. I proceed to manually turn on visibility for each entity that the user needs. But I run into problems for these system entities: dropdownArrow, DefaultMapMarkerIcon and SubsystemNotRunning. I cannot edit them since they are "System" objects. But the user can't "see" them either. What do I do?
Rob, when you search for that entity, the last column with the lock icon deals with visibility and permissions. Once you click on that, you can edit Visibility, Design Time and Run Time permissions. If you want to modify the entire collection permissions for, say all Things, it works the same way - in the Composer home screen, if you hover over 'Things', you should see the green plus icon (Add New Thing) and lock icon (Collection Permission).