The Project Designer is a convenient user interface in Visual Studio that enables you to set project properties, some of which you can also set through the Properties Window.
Allows you to specify the project's general application settings and properties, such as Assembly name, Assembly information, and Root namespace/Default namespace.
Allows you set debugging properties defining debugging behavior, such as start action, start options, and remote debugging are set in the Debug pane of the Project Designer.
Allows you to specify the project's application settings. You can create application-scoped settings, such as connection strings, which can be changed at run time; or user-scoped settings, such as system fonts, which can be changed at run time.
Allows you to use strong-name signing to sign application and deployment manifests, and also to sign your assembly. (The process of signing application and deployment manifests is separate and distinct from the process of signing an assembly, although both tasks are performed on the Signing page.)