Viewers can access documents in this workspace as well as in individual folders, subfolders, etc., provided this is intended.
As a maintainer, you can invite a viewer to the workspace by entering the viewer’s email address in the workspace settings and selecting the viewer role.
A manager who is not also an admin can also be downgraded to a viewer:
When you add a viewer to the workspace, you can define whether the viewer gets access only to the workspace itself or also to all folders and documents contained within it: