Layouts
A layout represents a drawing sheet, and typically includes
A drawing border and title block
One or more layout viewports that display views of model space
General notes, labels, and possibly dimensions
Tables and schedules
Usually a drawing file contains only one layout, but you can create as many layouts as you need. The first time you display a layout, it is initialized and a default page setup is assigned to it.
Once initialized, layouts can be modified, published, and added to sheet sets as sheets.