How do you create a new wall type in Revit?

Creating a new wall type in Revit typically involves duplicating an existing wall type rather than trying to create one from scratch. This process allows users to retain the properties and parameters of the existing wall type, ensuring consistency across the design. By using the Properties Palette, when you choose to duplicate an existing wall type, you can customize the new type by changing the wall thickness, materials, or any other parameters as needed. This method is efficient because it leverages existing configurations, enabling users to modify and adapt rather than starting from a blank slate.

The other options do not align with the process of creating a new wall type effectively. Simply using a menu to select 'New' does not exist in the same straightforward manner in Revit as duplicating serves. Drawing a wall in the model space does not create a new wall type but rather just adds a wall instance to the model. The 'Create Wall' command is primarily for placing walls in the design, not for defining new wall types. Therefore, duplicating an existing type is the accurate and recommended approach in Revit for creating a new wall type.