New Project Platform Dialog Box
Use the New Project Platform dialog box to select a different project platform.
Access this dialog box from the Configuration Manager dialog box by selecting <New...> from the Platform column for any project.
Select new platform
Lists the available platforms for the solution.
Copy settings from
Lists existing platforms for the current project. If you choose Default, the default settings are used.
Create new solution platforms
When selected, directs the integrated development environment (IDE) to find existing solution configurations that include this project configuration name, or to create new ones. As needed, the IDE might also revise the name of an existing solution configuration to include a specified platform name. For more information, see Build Configurations.