Switches from a layout tab to the Model tab.

Changes the names assigned to items such as layers and dimension styles.

Creates multiple viewports in model space or paper space.

Displays the identification number of the current viewport.

Sets the maximum number of viewports that can be active at one time in a layout.

Makes the Model tab or the last layout tab current.

Stores the center of view in the current viewport.

Stores the height of the view displayed in the current viewport, measured in drawing units.