Please pay special attention
to the edit mode tool bar options for batch setting permissions.
With 'Apply changes to all subitems', which is enabled by default in
the tool bar,
all permissions granted or denied for a parent folder will also be applied to all sub-items.
With
'Retain invisible items', print, save, and edit permissions can be
granted or denied for folders and their sub-items, but so far invisible
items will be exempt.
With 'Retain higher
permissions', view, print, and save permissions can be granted for
folders and their sub-items, but all already granted higher permissions
will be retained.