Customize menu > Viewport Configuration > Viewport Configuration dialog > Layout tab
Right-click a viewport label. > Configure > Viewport Configuration dialog > Layout tab
You specify the division method of viewports, and assign specific types of views to each viewport on the Layout panel of the Viewport Configuration dialog.
The layout is saved with the .gmax file, so you can store different layouts in separate .gmax files. Load the file you want, then merge in the contents of other files to maintain the layout.
Through MAXScript, there are commands to set the current layout to any of the 14 available setups. You can also activate any viewport and set the view type. This enables you to create macros and custom user interface buttons to set any layout you choose.
Interface
The Layout panel is arranged in two general areas. At the top are icons representing the possible division methods. Below these is a screen representation of the currently selected layout. Click an icon to select the division method, which appears in the larger screen representation.
To assign specific views, click in the viewport in the screen representation. Choose a viewport type from the menu that displays.