Layouts can contain viewports that show named model space views.
Project (DST) files created with the Sheet Set Manager in AutoCAD for Windows can contain sheet views that are named model space views. Views that are placed on a layout are displayed represented by a node in the Project Manager below the layout they are placed on.
Named model space views cannot be placed on a layout with the Project Manager. However, you can edit the properties of a view and place view label blocks for a view on a layout that has already been placed. If you modify the geometry in a drawing that contains the referenced named view, the changes are displayed on the layout as long as the changed geometry is within the boundary of the named view.