AutoCAD initially contains three layouts: a model space layout and two paper space layouts. These layouts can be accessed by tabs at the bottom of the drawing window in AutoCAD. The tabs are initially named Model, Layout1, and Layout2.
The Model tab is the default tab and represents model space, in which you generally create your drawing. The Layout1 and Layout2 tabs represent paper space and are generally used for laying out your drawing for printing. The paper space layouts display a paper image that shows the printable boundary for the configured print device.
It is recommended that you use paper space layouts for preparing final drawings for output, but printing can be performed from any layout, including the model space layout. For more information on using layouts in AutoCAD, see the AutoCAD User's Guide.