Viewport Configuration
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Views menu Viewport Configuration

Click or right-click the General viewport label (“[ + ]”) . General viewport label menu Configure Viewport Configuration dialog

The Viewport Configuration command displays the Viewport Configuration dialog. You use controls on this dialog to set options for viewport control.

All the configuration options are saved with the MAX scene file. To configure startup settings for your file, you can save a maxstart.max file. If this file exists, 3ds Max Design uses it to determine the viewport configuration and settings when 3ds Max Design is loaded or reset.