An associated viewer allows you to view = Folder Viewer documents in an associated viewer.
The association teams the folder name with the viewer, which appears in the title bar of Folder Viewer.
For example, if you open an item while working in = Perceptive Content Viewer, the item opens in Folder Viewer. You can view the item and can see the folder name in the viewer title bar. Depending on your preference, you can dock the viewers or open them separately.